Monica A. Valenzuela-Gamm, D.O.
Obstetrics & Gynecology Physician · Upland, CA
Monica A. Valenzuela-Gamm, D.O. is an obstetrics & gynecology physician with a practice address in Upland, California, and NPI 1477575694, issued on Jul 24, 2006. Check the license (California 20A8687, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Monica A. Valenzuela-Gamm
- Credential
- D.O.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 20A8687 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1310 San Bernardino RD, Upland, CA 91786
- Phone
- (909) 355-7855
- Enumerated
- Jul 24, 2006
- Record last updated
- Jun 7, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (909) 355-7856
- Medicare enrollment
- Enrolled (PECOS I20140604000839); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 1310 San Bernardino RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Basim Abdelkarim, MDGastroenterology Physician1932217544
- Mouhanad Alwan, MDObstetrics & Gynecology Physician1760595029
- Lorraine Dominick, WHNPObstetrics & Gynecology Nurse Practitioner1205265931
- Ian Donahue, PA-CPhysician Assistant1023406725
- Noralyne Eini, FNPFamily Nurse Practitioner1811395221
- Amanda Ingalls, PA-CPhysician Assistant1134522501
Verify Monica A. Valenzuela-Gamm in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A8687Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.4 times the Medicare Part D claims of the average obstetrics & gynecology physician in 2024
727 Medicare Part D claims for 157 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Estradiol203 claims
- Estradiol (Twice Weekly)90 claims
- Progesterone88 claims
- Tolterodine Tartrate Er49 claims
- Dotti31 claims
- Valacyclovir28 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: $499.31
13 payments; by number, the most common kind was food and beverage; the largest payer was Revance Therapeutics, 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.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Care For Womens Medical Group IncUpland, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Monica A. Valenzuela-Gamm among 5,088 obstetrics & gynecology physician records in California
Monica A. Valenzuela-Gamm, D.O. 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2001 · median 2004 among the 2,700 with a school on file
- Record last updated2011 · 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).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Upland → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Mouhanad Alwan, MDUpland, CA 917861760595029
- Lisa Chong, MDUpland, CA 917861467539304
- Joanna Du, M.D.Upland, CA 917861477731677
- Thomas Lee, MDUpland, CA 917861285614693
- Patricia Lee, M.D.Upland, CA 917861962418186
- William McLeod, M.D.Upland, CA 917861053448290
- Cecilia Phong, MDUpland, CA 917861114318151
- Brenna Sommer, DOUpland, CA 917861497266811
Common questions
What is Monica A. Valenzuela-Gamm, D.O.'s NPI number?
Monica A. Valenzuela-Gamm, D.O.'s National Provider Identifier (NPI) is 1477575694, issued on Jul 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Monica A. Valenzuela-Gamm, D.O. located?
The NPPES record lists a practice address at 1310 San Bernardino RD, Upland, CA, 91786. Phone: (909) 355-7855. Providers update this record themselves, so call before visiting.
How can I verify Monica A. Valenzuela-Gamm, D.O.'s license?
NPPES lists California license number 20A8687, 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 Monica A. Valenzuela-Gamm, D.O. prescribe under Medicare Part D?
In 2024, Monica A. Valenzuela-Gamm, D.O. had 727 Medicare Part D claims for 157 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.