Robert Charles Duncan, D.O.
Hospitalist Physician · Carmichael, CA
Robert Charles Duncan, D.O. is a hospitalist physician with a practice address in Carmichael, California, and NPI 1518124726, issued on May 16, 2008. Check the license (California 20A10205, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert Charles Duncan
- Credential
- D.O.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- 20A10205 CA
Self-reported in NPPES; status is on the state search - Practice location
- 6501 Coyle Ave, Carmichael, CA 95608
- Phone
- (916) 537-5079
- Enumerated
- May 16, 2008
- Record last updated
- Sep 27, 2023
- Fax
- (916) 966-3189
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 6501 Coyle Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Mina Ahmed, MDStudent in an Organized Health Care Education/Training Program1649113911
- Khurram Ali, M.D.Hospitalist Physician1760589790
- Deepika AluruAnesthesiology Physician1750313235
- Angel AmodoLicensed Psychiatric Technician1578246021
- Rayan Apelian, MDStudent in an Organized Health Care Education/Training Program1902749575
Verify Robert Charles Duncan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A10205Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
About as many Medicare Part D claims as the average hospitalist physician in 2024
522 Medicare Part D claims for 312 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 66 claims were for opioids.
Most prescribed
- Cephalexin75 claims
- Hydrocodone-Acetaminophen54 claims
- Azithromycin31 claims
- Ondansetron Odt28 claims
- Doxycycline Hyclate23 claims
- Amoxicillin-Clavulanate Potass21 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Robert Charles Duncan among 3,099 hospitalist physician records in California
Robert Charles Duncan, D.O. is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 34% of them.
- NPI issued2008 · 34% of these records are older, 61% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileNo · 81% of these records are
- Record last updated2023 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
29 hospitalist physician records list a practice address in Carmichael
They are 29 of the 1,440 NPPES records with a practice address in Carmichael, and 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Carmichael → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Khurram Ali, M.D.Carmichael, CA 956081760589790
- Dakane Billow, M.D.Carmichael, CA 956081063513604
- Andrew Bozdech, MDCarmichael, CA 956081962540575
- Vishnu Deepika Evuri, M.D.Carmichael, CA 956081871794016
- Gabriel Galofre, M.D.Carmichael, CA 956081659472298
- Rafieh Hajiani, M.D.Carmichael, CA 956081659472058
- Eva Lew, MDCarmichael, CA 956081558322347
- Guillermo Mantilla, M.D.Carmichael, CA 956081326234816
Common questions
What is Robert Charles Duncan, D.O.'s NPI number?
Robert Charles Duncan, D.O.'s National Provider Identifier (NPI) is 1518124726, issued on May 16, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Robert Charles Duncan, D.O. located?
The NPPES record lists a practice address at 6501 Coyle Ave, Carmichael, CA, 95608. Phone: (916) 537-5079. Providers update this record themselves, so call before visiting.
How can I verify Robert Charles Duncan, D.O.'s license?
NPPES lists California license number 20A10205, 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 Robert Charles Duncan, D.O. prescribe under Medicare Part D?
In 2024, Robert Charles Duncan, D.O. had 522 Medicare Part D claims for 312 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
What is Robert Charles Duncan, D.O.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.