Stephanie Louise Koontz, MD
Obstetrics & Gynecology Physician · Somerville, MA
Stephanie Louise Koontz, MD is an obstetrics & gynecology physician with a practice address in Somerville, Massachusetts, and NPI 1225108160, issued on Nov 8, 2006. Check the license (Massachusetts 220863, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Stephanie Louise Koontz
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 220863 MA
Self-reported in NPPES; status is on the state search - Practice location
- 40 Holland St, Somerville, MA 02144
- Phone
- (617) 629-6330
- Enumerated
- Nov 8, 2006
- Record last updated
- Jul 18, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (617) 629-6128
- Medicaid ID
- 2086115 MA
- Medicare enrollment
- Enrolled (PECOS I20040927000514); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,127 in Massachusetts → Look up another NPI →
Also registered at 40 Holland St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Carole Allen, M.D.Pediatrics Physician1275518235
- Andrew Angel, M.D.Internal Medicine Physician1417927724
- Dolly Arjun, PA-CPediatrics Physician1376924738
- Jill Ashcraft, DPMFoot & Ankle Surgery Podiatrist1316205909
- Rachel Berger, M.D.Internal Medicine Physician1326019456
Verify Stephanie Louise Koontz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 220863Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Mount Auburn Professional Services IncLexington, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephanie Louise Koontz among 1,127 obstetrics & gynecology physician records in Massachusetts
Stephanie Louise Koontz, MD is one of 1,127 obstetrics & gynecology physician records with a practice address in Massachusetts. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 16% of them.
- NPI issued2006 · 16% of these records are older, 50% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2000 · median 2004 among the 715 with a school on file
- Record last updated2011 · 64% 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 Massachusetts 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 Massachusetts
There are 1,127 obstetrics & gynecology physician records in Massachusetts.
All 1,127 in Massachusetts → Every provider in Somerville → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Cari Brown, M.D.Somerville, MA 021441699061580
- Sylvia FineSomerville, MA 021441306890967
- Patrick Nugent, MDNew Bedford, MA 021441801837638
- Fernando Roca Vall-Llobera, M.D.Somerville, MA 021441669645453
- Patricia Chaudhuri, MDSomerville, MA 021431275686974
- Melanie Blackstock, M.D.Malden, MA 021481477503571
- Sylvia Cho, DOMalden, MA 021481215340070
- David Richman, MDMalden, MA 021481285623645
Common questions
What is Stephanie Louise Koontz, MD's NPI number?
Stephanie Louise Koontz, MD's National Provider Identifier (NPI) is 1225108160, issued on Nov 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stephanie Louise Koontz, MD located?
The NPPES record lists a practice address at 40 Holland St, Somerville, MA, 02144. Phone: (617) 629-6330. Providers update this record themselves, so call before visiting.
How can I verify Stephanie Louise Koontz, MD's license?
NPPES lists Massachusetts license number 220863, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
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.