Our Phoenix office keeps Arizona time. How do we read a deadline you give in Eastern time?

Subtract three hours from the second Sunday in March to the first Sunday in November, and two hours for the rest of the year, because Arizona stays on Mountain Standard Time under A.R.S. 1-242 while Florida changes its clocks. On the Monday after each of those Sundays, check the date before assuming the previous week's Phoenix timing still holds.

A dust storm has stopped flights at Phoenix Sky Harbor. Is our shipment going to be late?

It may be. The haboob of 25 August 2025, for comparison, held Sky Harbor under an FAA ground stop for about an hour. A parcel caught by weather stays inside the carrier network, and we track it and call your named recipient if it slips. If it reaches your Phoenix suite with no dry ice left, it is replaced; for any other delay, a refund is possible and turns on whether temperature control held throughout transit.

Our clinic is in Ahwatukee. Do Phoenix rules or Tempe rules apply to our suite?

Ahwatukee Foothills is a village inside the City of Phoenix, so Phoenix rules apply: no general business license, a transaction privilege tax license only for taxable sales, and a new certificate of occupancy if the suite changed use. A suite with a Tempe address also needs Tempe's General Business License. The carrier lane and transit window are identical at both addresses.

Buying exosomes wholesale for Phoenix practices

Licensed Phoenix practices with a verified wholesale account may buy biomolecular signaling vesicles (exosomes), and each order ships frozen from Florida, bound for Arizona by carrier. Our 503A pharmacy partner holds an Arizona nonresident pharmacy license from the state board, which lets Phoenix prescribers write individual prescriptions to it; the partner dispenses each one and sends it on from Texas.

Phoenix at a glance

Phoenix at a glance
Item	Phoenix
County	Maricopa County; within city limits, the City of Phoenix Office of Emergency Management sends local warnings to phones through Wireless Emergency Alerts, with no sign-up
Summer heat	Normal July high of 106.5°F and July low of 84.5°F at Phoenix Sky Harbor, with about 111 days a year at 100°F or more (1991 to 2020 NOAA normals)
Clock	Mountain Standard Time all year under A.R.S. 1-242, so Phoenix runs three hours behind Florida from March to November and two hours behind from November to March
Delivery lane	National carrier lane
Shipping from Florida	Overnight shipping; arrival can take 1 to 3 business days
Free cold-chain shipping	On orders from $3,000
503A compounded preparations	Available. Prepared to an individual prescription by our 503A pharmacy partner, which is authorized as a nonresident pharmacy in Arizona, and dispensed for the patient named on the prescription. The pharmacy ships from Texas to the clinic or directly to the patient; ask us about shipping for a specific formulation.
Licensed practitioners in Phoenix	Dermatology 92, plastic surgery 36, nurse practitioners 1,200+, internal medicine 1,200+, by primary specialty in the NPPES registry as of 17 October 2026
State guide	How to buy exosomes in Arizona

When an order reaches a Phoenix practice

Exosome material for a Phoenix suite travels on the Arizona carrier lane and lands within the transit window that the panel at the top of this page lists. A prescription sent to the pharmacy partner becomes a separate parcel, which the pharmacy dispenses and sends out of Texas on a timetable it sets, addressed to either the clinic or the patient.

Arizona never moves its clocks. From the second Sunday in March to the first Sunday in November, any deadline we quote in Eastern time falls three hours earlier on a Phoenix wall clock, and two hours earlier through the winter. The gap shifts by an hour on each of those Sundays, so a Phoenix office that orders near a deadline should check which half of the year it is in.

Summer dust is the local weather delay. On 25 August 2025 a haboob swept across Phoenix and the FAA halted every arrival and departure at Sky Harbor for about an hour while wind damaged part of the Terminal 4 roof. A parcel stopped by a storm like that is kept by the carrier until the route reopens. We do not pause shipments because a Phoenix suite has closed, so an office that loses power after a monsoon storm places its next order once staff are back.

Cold-chain receiving at a Phoenix address

Phoenix heat leaves no safe hour for an unattended shipper. National Weather Service climate summaries show Sky Harbor reaching 110°F or above on 70 days in 2024 and on 37 days in 2025, and the station's warmest low on record is 97°F, first reached on 19 July 2023. A box left at a locked door, in a parked car or on an unshaded dock keeps warming after sunset.

Maricopa County runs its Heat Relief Network from 1 May to 30 September, and those are the months to be strict about who signs. Put one named person on the account along with the hours they work in the suite. When a box arrives, that person confirms dry ice is still present, notes the lot number and the time, and moves the vials straight into a freezer. Per the manufacturer's handling instructions, keep exosome material at -20°C for long-term storage and at 4°C after thawing.

Rules that apply to a Phoenix order

Phoenix issues no general business license; the city licenses only a short list of regulated activities. A Phoenix practice that also sells taxable goods needs a transaction privilege tax license, applied for through the Arizona Department of Revenue at AZTaxes.gov, with a $50 city fee due within 30 days of opening and renewed each 1 January.
A Phoenix certificate of occupancy stays with the property address even after a change of owner or tenant, but the Planning and Development Department policy says a new one must be established when the current use of the building or tenant space changes. Where that applies to a suite, the new certificate should be in hand before the suite is added to the account as a delivery address.
Phoenix City Code section 10-18 makes it unlawful to operate a massage establishment without a city license. Its one exclusion covers a business where everyone offering massage is a licensed barber, aesthetician, cosmetologist or nail technician working within that license, so a Phoenix medspa that offers massage should check the requirement before opening.

Federal and Arizona rules for an order

Areas near Phoenix on the same lane

Tempe, Guadalupe and Scottsdale receive orders on the same Arizona lane as Phoenix, with an identical transit window, yet each sets its own local rules. Tempe now requires a $25 annual General Business License for any business with a permanent location there, a license Phoenix does not have. Guadalupe, a town of under one square mile with Phoenix and Interstate 10 on its west and Tempe to its north and south, issues its own town business license. Ahwatukee Foothills, bounded by Interstate 10 on the east, South Mountain on the north and the Gila River Indian Community on the west and south, is a village inside the City of Phoenix, so an Ahwatukee suite follows Phoenix rules. Scottsdale, which licenses each business location separately, is covered on a separate page.

Scottsdale

Phoenix questions

Our Phoenix office keeps Arizona time. How do we read a deadline you give in Eastern time?: Subtract three hours from the second Sunday in March to the first Sunday in November, and two hours for the rest of the year, because Arizona stays on Mountain Standard Time under A.R.S. 1-242 while Florida changes its clocks. On the Monday after each of those Sundays, check the date before assuming the previous week's Phoenix timing still holds.
A dust storm has stopped flights at Phoenix Sky Harbor. Is our shipment going to be late?: It may be. The haboob of 25 August 2025, for comparison, held Sky Harbor under an FAA ground stop for about an hour. A parcel caught by weather stays inside the carrier network, and we track it and call your named recipient if it slips. If it reaches your Phoenix suite with no dry ice left, it is replaced; for any other delay, a refund is possible and turns on whether temperature control held throughout transit.
Our clinic is in Ahwatukee. Do Phoenix rules or Tempe rules apply to our suite?: Ahwatukee Foothills is a village inside the City of Phoenix, so Phoenix rules apply: no general business license, a transaction privilege tax license only for taxable sales, and a new certificate of occupancy if the suite changed use. A suite with a Tempe address also needs Tempe's General Business License. The carrier lane and transit window are identical at both addresses.

Sources and review

City of Phoenix, License Services (no general business license) (accessed 6 October 2026)
City of Phoenix, Transaction Privilege and Use Tax Licenses (accessed 6 October 2026)
City of Phoenix, Transaction Privilege and Use Tax License Fees (accessed 6 October 2026)
City of Phoenix Planning and Development, Certificate of Occupancy Policy (accessed 6 October 2026)
City of Phoenix License Services, Phoenix City Code Chapter 10 Article III (massage), section 10-18 (accessed 6 October 2026)
City of Phoenix Office of Emergency Management, Alerts and Warnings (accessed 6 October 2026)
City of Phoenix, Ahwatukee Foothills Village (accessed 6 October 2026)
City of Phoenix Planning Department, Ahwatukee Foothills Village profile (village boundaries) (accessed 6 October 2026)
Town of Guadalupe, About (accessed 6 October 2026)
Arizona Revised Statutes section 1-242, Standard time (accessed 6 October 2026)
NOAA NCEI, U.S. Climate Normals 1991 to 2020, monthly station data, Phoenix Sky Harbor International Airport (USW00023183) (accessed 12 October 2026)
National Weather Service Phoenix, 2024 Climate Year in Review (Sky Harbor days at 110°F or above) (accessed 6 October 2026)
National Weather Service Phoenix, 2025 Climate Year in Review (Sky Harbor days at 110°F or above) (accessed 6 October 2026)
NWS Phoenix on X, 97°F record warm low at Sky Harbor (first set 19 July 2023) (accessed 6 October 2026)
CNN, Phoenix haboob and Sky Harbor ground stop, 26 August 2025 (accessed 6 October 2026)
Maricopa County, Extreme Heat and Heat Relief Network (accessed 6 October 2026)
City of Tempe, General Business License (accessed 6 October 2026)
Town of Guadalupe, Business License Application (accessed 12 October 2026)
Arizona State Board of Pharmacy (accessed 6 October 2026)
FDA, Public Safety Notification on Exosome Products (accessed 6 October 2026)
CMS NPPES NPI Registry (accessed 6 October 2026)
Photo: Nils Huenerfuerst, Unsplash

Last reviewed 6 October 2026 by Benn Bluestein-Veyra, M.Sc. Organic Chemistry. Availability is read from the state registry at the time of the request.

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Exosome material is supplied for topical aesthetic use by licensed practitioners. No exosome product is FDA-approved to diagnose, treat, cure or prevent any disease. Full regulatory notice.