William Hardy Longfellow, M.D.
Internal Medicine Physician · Rancho Mirage, CA
William Hardy Longfellow, M.D. is an internal medicine physician with a practice address in Rancho Mirage, California, and NPI 1669886545, issued on Jun 18, 2014. Check the license (California A169852, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Hardy Longfellow
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- A169852 CA
0101262895 VA
Self-reported in NPPES; status is on the state search - Practice location
- 71780 San Jacinto Dr Ste H1, Rancho Mirage, CA 92270
- Phone
- (760) 340-6777
- Enumerated
- Jun 18, 2014
- Record last updated
- Dec 23, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20221024002714); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify William Hardy Longfellow in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A169852Check 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 internal medicine physician in 2024
679 Medicare Part D claims for 208 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 23 claims were for opioids.
Most prescribed
- Amlodipine Besylate33 claims
- Atorvastatin Calcium33 claims
- Pantoprazole Sodium26 claims
- Levothyroxine Sodium22 claims
- Losartan Potassium21 claims
- Metoprolol Succinate17 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.
Bills Medicare through 2 group practices
- Emergency And Acute Care Medical CorporationSan Diego, CA
- Focus ON Health IncSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Hardy Longfellow among 17,696 internal medicine physician records in California
William Hardy Longfellow, M.D. 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 2014, is newer than 74% of them.
- NPI issued2014 · 74% of these records are older, 24% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2014 · median 2004 among the 11,065 with a school on file
- Record last updated2020 · 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).
59 internal medicine physician records list a practice address in Rancho Mirage
They are 59 of the 1,600 NPPES records with a practice address in Rancho Mirage, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Rancho Mirage → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Syed Azam, M.D.Rancho Mirage, CA 922701811993454
- Maria I. Encarnita Garcia, M.D.Rancho Mirage, CA 922701871537977
- Russell Grant, M.D.Rancho Mirage, CA 922701922026533
- Joel Hirschberg, MDRancho Mirage, CA 922701962474650
- David Ko, MDRancho Mirage, CA 922701568405470
- Carlos Lopez, M.D.,M.P.H.Rancho Mirage, CA 922701003892894
- Hessam Mahdavi, MDRancho Mirage, CA 922701851393300
- Ravinderpal Mann, M.D.Rancho Mirage, CA 922701568480721
Common questions
What is William Hardy Longfellow, M.D.'s NPI number?
William Hardy Longfellow, M.D.'s National Provider Identifier (NPI) is 1669886545, issued on Jun 18, 2014. An NPI identifies a provider in billing; it is not a license.
Where is William Hardy Longfellow, M.D. located?
The NPPES record lists a practice address at 71780 San Jacinto Dr Ste H1, Rancho Mirage, CA, 92270. Phone: (760) 340-6777. Providers update this record themselves, so call before visiting.
How can I verify William Hardy Longfellow, M.D.'s license?
NPPES lists California license number A169852, 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 William Hardy Longfellow, M.D. prescribe under Medicare Part D?
In 2024, William Hardy Longfellow, M.D. had 679 Medicare Part D claims for 208 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.