Phillip Alexander Williams, MD
Obstetrics & Gynecology Physician · Flagstaff, AZ
Phillip Alexander Williams, MD is an obstetrics & gynecology physician with a practice address in Flagstaff, Arizona, and NPI 1437143716, issued on Sep 1, 2005. Check the license (Arizona 25398, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Phillip Alexander Williams
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 25398 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 1895 N Jasper Dr Ste 3, Flagstaff, AZ 86001
- Phone
- (928) 213-6385
- Enumerated
- Sep 1, 2005
- Record last updated
- Jul 15, 2026
- Medicaid ID
- 386062 AZ
- Medicare enrollment
- Enrolled (PECOS I20031219000741); accepts Medicare assignment
- Medical or professional school
- University Of Utah School Of Medicine, 1992
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 803 in Arizona → Look up another NPI →
Also registered at 1895 N Jasper Dr Ste 3
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Demetra Barr Reynolds, M.D.Family Medicine Physician1790721777
- Nicolette Dragony-Goff, APRNFamily Nurse Practitioner1952298770
- Lillian Eklof, DOStudent in an Organized Health Care Education/Training Program1669158135
- Katherine Kinney, MSWClinical Social Worker1669709366
- Emily Mammenga, MDPsychiatry Physician1245810217
- Leila Noghrehchi, MDFamily Medicine Physician1912657594
Verify Phillip Alexander Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 25398Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.0 times the Medicare Part D claims of the average obstetrics & gynecology physician in 2024
330 Medicare Part D claims for 142 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Estradiol116 claims
- Clobetasol Propionate24 claims
- Progesterone23 claims
- Venlafaxine Hcl Er19 claims
- Triamcinolone Acetonide12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $185.69
3 payments; by number, the most common kind was food and beverage; the largest payer was Hologic Sales and Service, LLC. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Genesis OB Gyn PLLCSierra Vista, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Phillip Alexander Williams among 803 obstetrics & gynecology physician records in Arizona
Phillip Alexander Williams, MD is one of 803 obstetrics & gynecology physician records with a practice address in Arizona. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1992 · median 2005 among the 477 with a school on file
- Record last updated2026 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Arizona
There are 803 obstetrics & gynecology physician records in Arizona.
All 803 in Arizona → Every provider in Flagstaff → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Carmen Alfonso, D.O.Flagstaff, AZ 860011386872315
- Jennifer Graff, MDFlagstaff, AZ 860011114108347
- Richard Johansen, MDFlagstaff, AZ 860011144213596
- Brian Lindstrom, MDFlagstaff, AZ 860011639157860
- Caitlin Marshall, DO, MPHFlagstaff, AZ 860011134707250
- Patrice Moore, MDFlagstaff, AZ 860011447394697
- Laurie Perrin, MDFlagstaff, AZ 860011912990367
- Audrey Roberts, MDFlagstaff, AZ 860011073953238
Common questions
What is Phillip Alexander Williams, MD's NPI number?
Phillip Alexander Williams, MD's National Provider Identifier (NPI) is 1437143716, issued on Sep 1, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Phillip Alexander Williams, MD located?
The NPPES record lists a practice address at 1895 N Jasper Dr Ste 3, Flagstaff, AZ, 86001. Phone: (928) 213-6385. Providers update this record themselves, so call before visiting.
How can I verify Phillip Alexander Williams, MD's license?
NPPES lists Arizona license number 25398, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Phillip Alexander Williams, MD prescribe under Medicare Part D?
In 2024, Phillip Alexander Williams, MD had 330 Medicare Part D claims for 142 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.