Frederick William Dieterich, M.D.
Obstetrics & Gynecology Physician · Vista, CA
Frederick William Dieterich, M.D. is an obstetrics & gynecology physician with a practice address in Vista, California, and NPI 1720183650, issued on Sep 14, 2006. Check the license (California GO41537, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Frederick William Dieterich
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- GO41537 CA
G041537 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1000 Valle Terrace, Vista, CA 92064
- Phone
- (760) 631-5000
- Enumerated
- Sep 14, 2006
- Record last updated
- Nov 13, 2023
- Fax
- (760) 414-3892
- Medicare enrollment
- Enrolled (PECOS I20051216000755); accepts Medicare assignment
- Medical or professional school
- Virginia Commonwealth University, School Of Medicine, 1976
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Verify Frederick William Dieterich in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license GO41537Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
8% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
151 Medicare Part D claims for 52 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Estradiol26 claims
- Progesterone11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 83.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $79.09
4 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US 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
- Vista Community ClinicVista, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Frederick William Dieterich among 5,088 obstetrics & gynecology physician records in California
Frederick William Dieterich, 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 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
- Graduated1976 · median 2004 among the 2,700 with a school on file
- Record last updated2023 · 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 Vista → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Helen Chang, M.D.Poway, CA 920641811099740
- Colette Eastman, DOPoway, CA 920641457423410
- Li Fan, M.D.Poway, CA 920641730282658
- Farina Islam, M.D.Poway, CA 920641922444306
- Timothy Maresh, MDPoway, CA 920641245339985
- Leslie Buncher, MDRancho Santa Fe, CA 920671104187137
- Ahmad Mehran, M.D.Rancho Santa Fe, CA 920671316213440
- Mitchell Besser, MDSan Marcos, CA 920691992814719
Common questions
What is Frederick William Dieterich, M.D.'s NPI number?
Frederick William Dieterich, M.D.'s National Provider Identifier (NPI) is 1720183650, issued on Sep 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Frederick William Dieterich, M.D. located?
The NPPES record lists a practice address at 1000 Valle Terrace, Vista, CA, 92064. Phone: (760) 631-5000. Providers update this record themselves, so call before visiting.
How can I verify Frederick William Dieterich, M.D.'s license?
NPPES lists California license number GO41537, 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 Frederick William Dieterich, M.D. prescribe under Medicare Part D?
In 2024, Frederick William Dieterich, M.D. had 151 Medicare Part D claims for 52 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Frederick William Dieterich, M.D.'s MIPS final score?
The 2023 MIPS final score is 83.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.