John M. Stack, MD
Obstetrics & Gynecology Physician · Willow Grove, PA
John M. Stack, MD is an obstetrics & gynecology physician with a practice address in Willow Grove, Pennsylvania, and NPI 1831181056, issued on Aug 16, 2005. Check the license (Pennsylvania MD011031E, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- John M. Stack
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- MD011031E PA
Self-reported in NPPES; status is on the state search - Practice location
- 735 Fitzwatertown RD, Willow Grove, PA 19090
- Phone
- (215) 914-4400
- Enumerated
- Aug 16, 2005
- Record last updated
- Dec 2, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (215) 657-4887
- Medicaid ID
- 00725447 PA
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,974 in Pennsylvania → Look up another NPI →
Also registered at 735 Fitzwatertown RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Vahideh Ameri, MDObstetrics & Gynecology Physician1043212574
- Michelle Anderson, CRNPFamily Nurse Practitioner1013302496
- Laura Borthwick, MDObstetrics & Gynecology Physician1598740714
- Arthur Castelbaum, MDReproductive Endocrinology Physician1700866670
- Nisha Cohen, M.D.Obstetrics & Gynecology Physician1265745251
- Deirdre Collins, M.D.Nephrology Physician1780793430
Verify John M. Stack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD011031ECheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
32 Medicare Part D claims, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 72% of claims.
Most prescribed
- Spiriva Respimat11 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.
John M. Stack among 1,974 obstetrics & gynecology physician records in Pennsylvania
John M. Stack, MD is one of 1,974 obstetrics & gynecology physician records with a practice address in Pennsylvania. 75% 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, 87% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2015 · 58% 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 Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
28 obstetrics & gynecology physician records list a practice address in Willow Grove
They are 28 of the 562 NPPES records with a practice address in Willow Grove, and 1,974 obstetrics & gynecology physician records in Pennsylvania.
All 1,974 in Pennsylvania → Every provider in Willow Grove → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Vahideh Ameri, MDWillow Grove, PA 190901043212574
- Laura Borthwick, MDWillow Grove, PA 190901598740714
- Stuart Dershaw, M.D.Willow Grove, PA 190901306848304
- Theresa Dugan, MDWillow Grove, PA 190901427054725
- William Frangipane, MDWillow Grove, PA 190901316942832
- Denise Hartman, MDWillow Grove, PA 190901215933312
- Robert Michaelson, MDWillow Grove, PA 190901760488100
- Joseph Murphy, MDWillow Grove, PA 190901093781148
Common questions
What is John M. Stack, MD's NPI number?
John M. Stack, MD's National Provider Identifier (NPI) is 1831181056, issued on Aug 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John M. Stack, MD located?
The NPPES record lists a practice address at 735 Fitzwatertown RD, Willow Grove, PA, 19090. Phone: (215) 914-4400. Providers update this record themselves, so call before visiting.
How can I verify John M. Stack, MD's license?
NPPES lists Pennsylvania license number MD011031E, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John M. Stack, MD prescribe under Medicare Part D?
In 2024, John M. Stack, MD had 32 Medicare Part D claims; 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.