David W. Hirshfield, MD
Internal Medicine Physician · La Jolla, CA
David W. Hirshfield, MD is an internal medicine physician with a practice address in La Jolla, California, and NPI 1538127402, issued on May 2, 2006. Check the license (California A61886, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- David W. Hirshfield
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- A61886 CA
D0057896 MD
Self-reported in NPPES; status is on the state search - Practice location
- 9850 Genesee Ave Ste 320, La Jolla, CA 92037
- Phone
- (858) 554-1212
- Enumerated
- May 2, 2006
- Record last updated
- Feb 3, 2022
- Fax
- (858) 795-1195
- Medicare enrollment
- Enrolled (PECOS I20220216000392); accepts Medicare assignment
- Medical or professional school
- University Of Colorado School Of Medicine, Denver, 1994
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 9850 Genesee Ave Ste 320
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Claire Anspach, RDRegistered Dietitian1093314130
- Mitra Bahaee, MDFamily Medicine Physician1407417736
- Lindzee Baker, PA-CPhysician Assistant1932827318
- Jantima Becker, PAPhysician Assistant1497370514
Verify David W. Hirshfield in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A61886Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,766 Medicare Part D claims for 257 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 80 claims were for opioids.
Most prescribed
- Atorvastatin Calcium151 claims
- Amlodipine Besylate91 claims
- Gabapentin77 claims
- Tamsulosin Hcl75 claims
- Losartan Potassium70 claims
- Rosuvastatin Calcium70 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: $1,303.18
51 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Monica Perlman MD IncLa Jolla, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David W. Hirshfield among 17,696 internal medicine physician records in California
David W. Hirshfield, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% 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, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1994 · median 2004 among the 11,065 with a school on file
- Record last updated2022 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
158 internal medicine physician records list a practice address in La Jolla
They are 158 of the 3,648 NPPES records with a practice address in La Jolla, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in La Jolla → Internal Medicine Physician nationwide →
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Common questions
What is David W. Hirshfield, MD's NPI number?
David W. Hirshfield, MD's National Provider Identifier (NPI) is 1538127402, issued on May 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David W. Hirshfield, MD located?
The NPPES record lists a practice address at 9850 Genesee Ave Ste 320, La Jolla, CA, 92037. Phone: (858) 554-1212. Providers update this record themselves, so call before visiting.
How can I verify David W. Hirshfield, MD's license?
NPPES lists California license number A61886, 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 W. Hirshfield, MD prescribe under Medicare Part D?
In 2024, David W. Hirshfield, MD had 2,766 Medicare Part D claims for 257 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.