Robert Grossman, MD
NPI 1053462606 · Obstetrics Physician · Thousand Oaks, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Grossman, MD is a Obstetrics Physician provider in Thousand Oaks, CA (NPI 1053462606).
Provider details
- NPI number
- 1053462606
- Entity type
- Individual
- Primary specialty
- Obstetrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G039997 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
622 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 272 | $137 |
| Cervical Or Vaginal Cancer Screening; Pelvic and Clinical Breast ExaminationG0101 | 197 | $42 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 46 | $97 |
| Smear for Infectious Agents87210 | 41 | $6 |
| Assessment of Emotional Or Behavioral Problems96127 | 40 | $5 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 26 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Estradiol | 139 | 47 |
| Progesterone, Micronizedbrand: Progesterone | 66 | 19 |
| Estradiolbrand: Estradiol (twice Weekly) | 45 | 14 |
| Terconazole | 33 | 20 |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 26 | 15 |
| Clotrimazole/Betamethasone Dipbrand: Clotrimazole-Betamethasone | 25 | 16 |
| Alprazolam |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$65 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-12
- Last updated
- 2014-10-23
Frequently asked questions
- What is Robert Grossman's NPI number?
- Robert Grossman's National Provider Identifier (NPI) is 1053462606, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Grossman's specialty?
- Robert Grossman is listed in the NPPES registry with a primary specialty of Obstetrics Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Grossman located?
- Robert Grossman's practice location on file with NPPES is 558 Ventu Park Rd Ste a, Thousand Oaks, CA 91320-2752.
- What is Robert Grossman's phone number?
- The practice phone number listed in the NPPES registry for Robert Grossman is (818) 817-9832.
- Does Robert Grossman accept Medicare?
- Robert Grossman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Grossman's NPI active?
- Yes — Robert Grossman's NPI (1053462606) is active in the NPPES registry as of the last update on 2014-10-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.