NPPES file of Aug 9, 2026

Glenn Mark Grossman, M.D.

Obstetrics & Gynecology Physician · Mission Hills, CA

Glenn Mark Grossman, M.D. is an obstetrics & gynecology physician with a practice address in Mission Hills, California, and NPI 1063693000, issued on Nov 19, 2007. Check the license (California G74125, as entered in NPPES) on the Medical Board of California; 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
1063693000
Name
Glenn Mark Grossman
Credential
M.D.
Primary taxonomy
Obstetrics & Gynecology Physician 207V00000X
License number
G74125 CA
Self-reported in NPPES; status is on the state search
Practice location
11600 Indian Hills RD, Mission Hills, CA 91345
Phone
(818) 838-4500
Enumerated
Nov 19, 2007
Record last updated
Dec 16, 2025
Medicare enrollment
Enrolled (PECOS I20040512001665); accepts Medicare assignment
Medical or professional school
Rutgers R W Johnson Medical School (Cam/New Bruns/Pisc), 1988
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →

Also registered at 11600 Indian Hills RD

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

  1. Anabel Alcaraz Vargas, MD, MPHStudent in an Organized Health Care Education/Training Program1730821497
  2. Linda Alipuria, RNDiabetes Educator Registered Nurse1851528277
  3. Jaime Altamirano, M.D.Internal Medicine Physician1689680092
  4. Daanish Arastu, MDFamily Medicine Physician1619474194
  5. Luisa Arevalo, MDFamily Medicine Physician1073256558
  6. Carol Ashe, ARNPObstetrics & Gynecology Nurse Practitioner1720082654

Verify Glenn Mark Grossman in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G74125    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 California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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5% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024

156 Medicare Part D claims for 48 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 26% of claims.

  1. Glenn Grossman156
  2. Specialty average165

Most prescribed

  1. Estradiol (Once Weekly)17 claims
  2. Clotrimazole-Betamethasone16 claims
  3. Estradiol16 claims
  4. Progesterone15 claims
  5. Hailey 24 Fe13 claims
  6. Premarin13 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: $164.09

7 payments; by number, the most common kind was food and beverage; the largest payer was Organon 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.

  1. Glenn Grossman$164.09
  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.

Bills Medicare through 2 group practices

  1. Healthcare Partners Affiliates Medical GroupMission Hills, CA
  2. Obhg California PCNorthridge, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Glenn Mark Grossman among 5,088 obstetrics & gynecology physician records in California

Glenn Mark Grossman, M.D. is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 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 2007, is newer than 48% of them.

  • NPI issued2007 · 48% of these records are older, 38% newer
  • In a Medicare fileYes · 74% of these records are
  • In the CMS Doctors and Clinicians fileYes · 53% of these records are
  • Graduated1988 · median 2004 among the 2,700 with a school on file
  • Record last updated2025 · 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 California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

16 obstetrics & gynecology physician records list a practice address in Mission Hills

They are 16 of the 731 NPPES records with a practice address in Mission Hills, and 5,088 obstetrics & gynecology physician records in California.

All 5,088 in California → Every provider in Mission Hills → Obstetrics & Gynecology Physician nationwide →

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

  1. Li-Ching Chen, MD.Mission Hills, CA 913451578577326
  2. Martin Cooper, MD.Mission Hills, CA 913451275547028
  3. Martina Di Bella, M.D.Mission Hills, CA 913451255817821
  4. Jack Dym, MDMission Hills, CA 913451215029483
  5. Paniz Heidari, D.O.Mission Hills, CA 913451821435637
  6. Kathryn Hinnenkamp, MD.Mission Hills, CA 913451922203546
  7. Stephanie Marr, D.O.Mission Hills, CA 913451750726899
  8. Leo Peress, M.D.Mission Hills, CA 913451932280591

Common questions

What is Glenn Mark Grossman, M.D.'s NPI number?

Glenn Mark Grossman, M.D.'s National Provider Identifier (NPI) is 1063693000, issued on Nov 19, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Glenn Mark Grossman, M.D. located?

The NPPES record lists a practice address at 11600 Indian Hills RD, Mission Hills, CA, 91345. Phone: (818) 838-4500. Providers update this record themselves, so call before visiting.

How can I verify Glenn Mark Grossman, M.D.'s license?

NPPES lists California license number G74125, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Glenn Mark Grossman, M.D. prescribe under Medicare Part D?

In 2024, Glenn Mark Grossman, M.D. had 156 Medicare Part D claims for 48 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.