Isabel Quintana Greenfield, M.D.
Obstetrics & Gynecology Physician · Missoula, MT
Isabel Quintana Greenfield, M.D. is an obstetrics & gynecology physician with a practice address in Missoula, Montana, and NPI 1326432873, issued on Mar 23, 2015. Check the license (Montana MED-PHYS-APP-142558, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Isabel Quintana Greenfield
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- MED-PHYS-APP-142558 MT
A144104 CA
Self-reported in NPPES; status is on the state search - Practice location
- 401 Railroad St W, Missoula, MT 59802
- Phone
- (406) 258-4494
- Enumerated
- Mar 23, 2015
- Record last updated
- Feb 13, 2025
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 125 in Montana → Look up another NPI →
Also registered at 401 Railroad St W
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kiley Adams, MDStudent in an Organized Health Care Education/Training Program1275383374
- Beth Ammons, MDFamily Medicine Physician1780623926
- Abigail Anderson, MDStudent in an Organized Health Care Education/Training Program1386448595
- Jean Baumgardner, APRNFamily Nurse Practitioner1346654258
- Shivani BeallStudent in an Organized Health Care Education/Training Program1942004023
- Brett Bell, M.D., M.P.H.Family Medicine Physician1316359326
Verify Isabel Quintana Greenfield in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license MED-PHYS-APP-142558Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
60 Medicare Part D claims for 25 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Acyclovir14 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.
Isabel Quintana Greenfield among 125 obstetrics & gynecology physician records in Montana
Isabel Quintana Greenfield, M.D. is one of 125 obstetrics & gynecology physician records with a practice address in Montana. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 82% of them.
- NPI issued2015 · 82% of these records are older, 14% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2025 · 50% 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 Montana 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 Montana
There are 125 obstetrics & gynecology physician records in Montana.
All 125 in Montana → Every provider in Missoula → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Elise Abicht, MDMissoula, MT 598021497071054
- Janice Givler, M.D.Missoula, MT 598021700833662
- Robert Humble, M.D.Missoula, MT 598021396034328
- Jennifer Mayo, M.D.Missoula, MT 598021437353232
- Amethyst Smith, MDMissoula, MT 598021053765164
- Thomas Baumgartner, Md PcMissoula, MT 598041497712764
- Beverly Braak, M.D.Missoula, MT 598041922054550
- Gary Harvey, MDMissoula, MT 598041962457663
Common questions
What is Isabel Quintana Greenfield, M.D.'s NPI number?
Isabel Quintana Greenfield, M.D.'s National Provider Identifier (NPI) is 1326432873, issued on Mar 23, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Isabel Quintana Greenfield, M.D. located?
The NPPES record lists a practice address at 401 Railroad St W, Missoula, MT, 59802. Phone: (406) 258-4494. Providers update this record themselves, so call before visiting.
How can I verify Isabel Quintana Greenfield, M.D.'s license?
NPPES lists Montana license number MED-PHYS-APP-142558, as entered by the provider. Search the Montana Board of Medical Examiners at https://ebiz.mt.gov/POL/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Isabel Quintana Greenfield, M.D. prescribe under Medicare Part D?
In 2024, Isabel Quintana Greenfield, M.D. had 60 Medicare Part D claims for 25 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.