NPPES file of Aug 9, 2026

Mary T. Grimm, M.D.

Obstetrics & Gynecology Physician · Chesterfield, MO

Mary T. Grimm, M.D. is an obstetrics & gynecology physician with a practice address in Chesterfield, Missouri, and NPI 1699866558, issued on Sep 27, 2006. Check the license (Missouri MDR7P90, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1699866558
Name
Mary T. Grimm
Credential
M.D.
Primary taxonomy
Obstetrics & Gynecology Physician 207V00000X
License number
MDR7P90 MO
Self-reported in NPPES; status is on the state search
Practice location
226 S Woods Mill RD, Chesterfield, MO 63017
Phone
(314) 878-7333
Enumerated
Sep 27, 2006
Record last updated
Dec 28, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(314) 878-7453
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest obstetrics & gynecology physician records → All 902 in Missouri → Look up another NPI →

Also registered at 226 S Woods Mill RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Jan Albrecht-McClure, M.D.Maternal & Fetal Medicine Physician1649263104
  2. William Benedict, M.D.Internal Medicine Physician1902845076
  3. Paul Buse, M.D.Gastroenterology Physician1114993664
  4. Michael Cleary, M.D.Gastroenterology Physician1124098546
  5. Christie Cohoon, MPT,DPTPhysical Therapist1821295429
  6. Kelly Constable, M.S.Audiologist1447395249

Verify Mary T. Grimm in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
    Search for license MDR7P90    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Missouri license search

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3.8 times the Medicare Part D claims of the average obstetrics & gynecology physician in 2024

622 Medicare Part D claims for 151 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.

  1. Mary Grimm622
  2. Specialty average165

Most prescribed

  1. Estradiol80 claims
  2. Progesterone58 claims
  3. Estradiol (Twice Weekly)46 claims
  4. Valacyclovir35 claims
  5. Premarin34 claims
  6. Raloxifene Hcl31 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: $206.72

12 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. 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.

  1. Mary Grimm$206.72
  2. Specialty average$1,030.61

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Mary T. Grimm among 902 obstetrics & gynecology physician records in Missouri

Mary T. Grimm, M.D. is one of 902 obstetrics & gynecology physician records with a practice address in Missouri. 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 2006, is newer than 11% of them.

  • NPI issued2006 · 11% of these records are older, 54% newer
  • In a Medicare fileYes · 74% of these records are
  • In the CMS Doctors and Clinicians fileNo · 59% of these records are
  • Record last updated2021 · 55% 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 Missouri 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 Missouri

There are 902 obstetrics & gynecology physician records in Missouri.

All 902 in Missouri → Every provider in Chesterfield → Obstetrics & Gynecology Physician nationwide →

The 8 obstetrics & gynecology physician records with the nearest ZIP codes

  1. Angela Cartwright, D.O.Chesterfield, MO 630171548252000
  2. Gordon Goldman, M.D.Chesterfield, MO 630171417066044
  3. William Houck, M.D.Chesterfield, MO 630171265520282
  4. Paul Lapoint, M.D.Chesterfield, MO 630171619064516
  5. Katherine Maxson, MDChesterfield, MO 630171144242561
  6. Jennifer McDonald, D.O.Chesterfield, MO 630171376641886
  7. Laura Moore, M.D.Chesterfield, MO 630171043431885
  8. Caroline Morgan, M.D.Chesterfield, MO 630171033148812

Common questions

What is Mary T. Grimm, M.D.'s NPI number?

Mary T. Grimm, M.D.'s National Provider Identifier (NPI) is 1699866558, issued on Sep 27, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Mary T. Grimm, M.D. located?

The NPPES record lists a practice address at 226 S Woods Mill RD, Chesterfield, MO, 63017. Phone: (314) 878-7333. Providers update this record themselves, so call before visiting.

How can I verify Mary T. Grimm, M.D.'s license?

NPPES lists Missouri license number MDR7P90, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Mary T. Grimm, M.D. prescribe under Medicare Part D?

In 2024, Mary T. Grimm, M.D. had 622 Medicare Part D claims for 151 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.