David Daniel Hahn, D.O.
Family Medicine Physician · Chico, CA
David Daniel Hahn, D.O. is a family medicine physician with a practice address in Chico, California, and NPI 1255385597, issued on May 20, 2006. Check the license (California 20A8638, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- David Daniel Hahn
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A8638 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1531 Esplanade, Chico, CA 95926
- Phone
- (530) 332-5557
- Enumerated
- May 20, 2006
- Record last updated
- Aug 17, 2023
- Medicare enrollment
- Enrolled (PECOS I20051018000716); accepts Medicare assignment
- Medical or professional school
- Midwestern University, Chicago College Of Osteopathic Med, 2002
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1531 Esplanade
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Mark Allen, M.D.Psychiatry Physician1114155256
- Francisco Alvarez, M.D.Hospitalist Physician1588690648
- Kelley Alvarez, P.A.Physician Assistant1912393448
- Travis Anderson, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1730456468
Verify David Daniel Hahn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A8638Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average family medicine physician in 2024
732 Medicare Part D claims for 262 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 24 claims were for opioids.
Most prescribed
- Atorvastatin Calcium38 claims
- Pantoprazole Sodium37 claims
- Furosemide36 claims
- Amlodipine Besylate35 claims
- Carvedilol34 claims
- Prednisone33 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): 76.7 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).
Bills Medicare through 2 group practices
- Enloe Health And WellnessChico, CA
- Enloe Medical CenterChico, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David Daniel Hahn among 17,133 family medicine physician records in California
David Daniel Hahn, D.O. is one of 17,133 family medicine physician records with a practice address in California. 81% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2002 · median 2005 among the 10,652 with a school on file
- Record last updated2023 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
43 family medicine physician records list a practice address in Chico
They are 43 of the 3,684 NPPES records with a practice address in Chico, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Chico → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Courtney Badour, DOChico, CA 959261093718637
- Oswald Chan, M.D.Chico, CA 959261780676882
- Amy Darwin, MDChico, CA 959261407827660
- Frederick David, MDChico, CA 959261255313565
- Walid Faraj, D.O.Chico, CA 959261396736245
- Terrance Foster, M.D.Chico, CA 959261013970342
- Tanya Layne, MDChico, CA 959261396740429
- Joseph Lee, MDChico, CA 959261821093584
Common questions
What is David Daniel Hahn, D.O.'s NPI number?
David Daniel Hahn, D.O.'s National Provider Identifier (NPI) is 1255385597, issued on May 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David Daniel Hahn, D.O. located?
The NPPES record lists a practice address at 1531 Esplanade, Chico, CA, 95926. Phone: (530) 332-5557. Providers update this record themselves, so call before visiting.
How can I verify David Daniel Hahn, D.O.'s license?
NPPES lists California license number 20A8638, 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 David Daniel Hahn, D.O. prescribe under Medicare Part D?
In 2024, David Daniel Hahn, D.O. had 732 Medicare Part D claims for 262 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is David Daniel Hahn, D.O.'s MIPS final score?
The 2023 MIPS final score is 76.7 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.