Monica Valenzuela-Gamm, D.O.
NPI 1477575694 · Obstetrics & Gynecology Physician · Upland, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Monica Valenzuela-Gamm, D.O. is a Obstetrics & Gynecology Physician provider in Upland, CA (NPI 1477575694).
Provider details
- NPI number
- 1477575694
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- 20A8687 (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
126 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 | 77 | $132 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 23 | $94 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 14 | $171 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 12 | $133 |
Typical Medicare-allowed amounts for these services range $94–$171 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Estradiol | 203 | 82 |
| Estradiolbrand: Estradiol (twice Weekly) | 90 | 28 |
| Progesterone, Micronizedbrand: Progesterone | 88 | 25 |
| Tolterodine Tartratebrand: Tolterodine Tartrate Er | 49 | 15 |
| Estradiolbrand: Dotti | 31 | — |
| Valacyclovir Hclbrand: Valacyclovir | 28 | — |
| Estradiolbrand: Imvexxy | 22 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$499 across 13 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
- 2006-07-24
- Last updated
- 2011-06-07
Frequently asked questions
- What is Monica Valenzuela-Gamm's NPI number?
- Monica Valenzuela-Gamm's National Provider Identifier (NPI) is 1477575694, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Monica Valenzuela-Gamm's specialty?
- Monica Valenzuela-Gamm is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Monica Valenzuela-Gamm located?
- Monica Valenzuela-Gamm's practice location on file with NPPES is 1310 San Bernardino Rd, Upland, CA 91786-4979.
- What is Monica Valenzuela-Gamm's phone number?
- The practice phone number listed in the NPPES registry for Monica Valenzuela-Gamm is (909) 355-7855.
- Does Monica Valenzuela-Gamm accept Medicare?
- Monica Valenzuela-Gamm is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Monica Valenzuela-Gamm's NPI active?
- Yes — Monica Valenzuela-Gamm's NPI (1477575694) is active in the NPPES registry as of the last update on 2011-06-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.