Paul Diehl, M.D.
Internal Medicine Physician · West Hills, CA
Paul Diehl, M.D. is an internal medicine physician with a practice address in West Hills, California, and NPI 1336215607, issued on Nov 28, 2006. Check the license (California A044437, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Paul Diehl
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A044437 CA
Self-reported in NPPES; status is on the state search - Practice location
- 23101 Sherman PL, West Hills, CA 91307
- Phone
- (818) 347-1500
- Enumerated
- Nov 28, 2006
- Entity
- Type 1 · individual
Also registered at 23101 Sherman PL
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Paul Diehl in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A044437Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
2.7 times the Medicare Part D claims of the average internal medicine physician in 2024
7,511 Medicare Part D claims for 368 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 351 claims were for opioids.
Most prescribed
- Atorvastatin Calcium301 claims
- Amlodipine Besylate274 claims
- Levothyroxine Sodium247 claims
- Metoprolol Succinate165 claims
- Alprazolam160 claims
- Gabapentin153 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 Medicare quality score for 2023: 86.9 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $634.83
20 payments, mostly food and beverage; the largest payer was Abbvie Inc.. The 65,274 providers of this specialty with any payment received $2,536.66 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.
27 internal medicine physician records list a West Hills practice address
They are 27 of the 708 NPPES records with a West Hills practice address, and 20,403 internal medicine physician records in California.
All 27 in West Hills → All 20,403 in California → Every provider in West Hills →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Paul Diehl, M.D.'s NPI number?
Paul Diehl, M.D.'s National Provider Identifier (NPI) is 1336215607, issued on Nov 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Paul Diehl, M.D. located?
The NPPES record lists a practice address at 23101 Sherman PL, West Hills, CA, 91307. Phone: (818) 347-1500. Providers update this record themselves, so call before visiting.
How can I verify Paul Diehl, M.D.'s license?
NPPES lists California license number A044437, 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 Paul Diehl, M.D. prescribe under Medicare Part D?
In 2024, Paul Diehl, M.D. had 7,511 Medicare Part D claims for 368 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
What is Paul Diehl, M.D.'s Medicare quality score?
The 2023 MIPS final score is 86.9 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.