Harbir D. Singh, M.D.
Internal Medicine Physician · Tucson, AZ
Harbir D. Singh, M.D. is an internal medicine physician with a practice address in Tucson, Arizona, and NPI 1508844846, issued on Jan 6, 2006. Check the license (Arizona 32999, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Harbir D. Singh
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 32999 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 5663 E Grant RD, Tucson, AZ 85712
- Phone
- (520) 433-4964
- Enumerated
- Jan 6, 2006
- Record last updated
- Jan 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (520) 204-1940
- Medicare enrollment
- Enrolled (PECOS I20041101000963); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,853 in Arizona → Look up another NPI →
Also registered at 5663 E Grant RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Katherine Ball, FNP-BCFamily Nurse Practitioner1306673512
- Francisco Carrillo, ACNPAcute Care Nurse Practitioner1215290267
- Georgette George, FNP-CFamily Nurse Practitioner1700058658
- Ashley Hack, NPGeriatric Medicine (Internal Medicine) Physician1821777608
- Jessica RepoldaNurse Practitioner1790431740
- Francisco Rodriguez Martinez, FNP-CFamily Nurse Practitioner1578133914
Verify Harbir D. Singh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 32999Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average internal medicine physician in 2024
8,154 Medicare Part D claims for 250 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 88 claims were for opioids.
Most prescribed
- Atorvastatin Calcium462 claims
- Levothyroxine Sodium329 claims
- Sertraline Hcl264 claims
- Divalproex Sodium251 claims
- Gabapentin250 claims
- Lisinopril243 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: $155.47
8 payments; by number, the most common kind was food and beverage; the largest payer was Teva Pharmaceuticals USA, Inc. 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
- Pinnacle Health Care LLCTucson, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Harbir D. Singh among 2,853 internal medicine physician records in Arizona
Harbir D. Singh, M.D. is one of 2,853 internal medicine physician records with a practice address in Arizona. 75% 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 13% of them.
- NPI issued2006 · 13% of these records are older, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1992 · median 2003 among the 1,643 with a school on file
- Record last updated2021 · 51% 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 Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
651 internal medicine physician records list a practice address in Tucson
They are 651 of the 18,788 NPPES records with a practice address in Tucson, and 2,853 internal medicine physician records in Arizona.
All 2,853 in Arizona → Every provider in Tucson → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- William Abraham, MDTucson, AZ 857121669468195
- Sheela Bhat, M.D.Tucson, AZ 857121598752008
- Muralikrishna Bhat, M.D.Tucson, AZ 857121114914637
- Douglas Bischoff, M.D.Tucson, AZ 857121821085333
- George Haloftis, D.O.Tucson, AZ 857121740277268
- Thomas Headlee, M.D.Tucson, AZ 857121194711630
- Kathleen Iveson, M.D.Tucson, AZ 857121720074263
- Gerome Kantor, MDTucson, AZ 857121407850290
Common questions
What is Harbir D. Singh, M.D.'s NPI number?
Harbir D. Singh, M.D.'s National Provider Identifier (NPI) is 1508844846, issued on Jan 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Harbir D. Singh, M.D. located?
The NPPES record lists a practice address at 5663 E Grant RD, Tucson, AZ, 85712. Phone: (520) 433-4964. Providers update this record themselves, so call before visiting.
How can I verify Harbir D. Singh, M.D.'s license?
NPPES lists Arizona license number 32999, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Harbir D. Singh, M.D. prescribe under Medicare Part D?
In 2024, Harbir D. Singh, M.D. had 8,154 Medicare Part D claims for 250 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.