NPPES file of Aug 9, 2026

Timothy M. Hsieh, M.D.

Geriatric Medicine (Internal Medicine) Physician · Tahlequah, OK

Timothy M. Hsieh, M.D. is a geriatric medicine (internal medicine) physician with a practice address in Tahlequah, Oklahoma, and NPI 1265423883, issued on Nov 2, 2005. Check the license on the Oklahoma Board of Medical Licensure and Supervision; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2023 and 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1265423883
Name
Timothy M. Hsieh
Credential
M.D.
Primary taxonomy
Geriatric Medicine (Internal Medicine) Physician 207RG0300X
License number
220511 NY
Self-reported in NPPES; status is on the state search
Practice location
100 S Bliss Ave, Tahlequah, OK 74464
Phone
(918) 458-3110
Enumerated
Nov 2, 2005
Record last updated
Jan 11, 2011 (not updated in 15 years: call before relying on the address or phone)
Medicaid ID
200015040A OK
Medicare enrollment
Enrolled (PECOS I20031210001056); accepts Medicare assignment
Medical or professional school
New York Medical College, 1998
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 100 S Bliss Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Kristen Adams, APRN-CNPFamily Nurse Practitioner1356842140
  2. Linzi Allen, PHARMDPharmacist1538474226
  3. Craig Alpaugh, RPACPhysician Assistant1851471015
  4. Lori Alred, PHARM.D.Pharmacotherapy Pharmacist1942308648
  5. Hope Baluh, M.D.Surgery Physician1932294642
  6. Martha Barlow, D.O.Family Medicine Physician1780797456

Verify Timothy M. Hsieh in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersOklahoma Board of Medical Licensure and SupervisionCheck the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Oklahoma license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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97% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024

114 Medicare Part D claims for 34 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.

  1. Timothy Hsieh114
  2. Specialty average4,246

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 practice group's MIPS final score for 2023 (Medicare payment program): 78.8 of 100

The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.

  1. Qualityout of 100 · 30% of the final score61.6
  2. Costout of 100 · 30%65.1
  3. Promoting interoperabilityout of 100 · 25%98.0
  4. Improvement activities40 of 40 points · 15%100.0

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

2 hospitals and group practices

  1. Northeastern Health SystemTahlequah, OK · Acute Care Hospitals2 of 5 stars
  2. Cherokee NationTahlequah, OK

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Timothy M. Hsieh among 27 geriatric medicine (internal medicine) physician records in Oklahoma

Timothy M. Hsieh, M.D. is one of 27 geriatric medicine (internal medicine) physician records with a practice address in Oklahoma. 48% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 96% newer
  • In a Medicare fileYes · 48% of these records are
  • In the CMS Doctors and Clinicians fileYes · 30% of these records are
  • Record last updated2011 · 70% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a Oklahoma practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Geriatric Medicine (Internal Medicine) Physician providers in Oklahoma

There are 27 geriatric medicine (internal medicine) physician records in Oklahoma.

The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes

  1. Victoria Harris, M.D.Muskogee, OK 744011205921475
  2. Insung Kim, MDTulsa, OK 741361528038981
  3. Chandini Sharma, MDTulsa, OK 741361568550051
  4. John Carment, MDTulsa, OK 741351013129329
  5. Lisa Duckett, M.D.Tulsa, OK 741351730444746
  6. Martha Root, DOTulsa, OK 741351720058191
  7. Kenneth Kirk, MDTulsa, OK 741331073521332
  8. Christopher Taylor, DOBartlesville, OK 740061124053178

Common questions

What is Timothy M. Hsieh, M.D.'s NPI number?

Timothy M. Hsieh, M.D.'s National Provider Identifier (NPI) is 1265423883, issued on Nov 2, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Timothy M. Hsieh, M.D. located?

The NPPES record lists a practice address at 100 S Bliss Ave, Tahlequah, OK, 74464. Phone: (918) 458-3110. Providers update this record themselves, so call before visiting.

How can I verify Timothy M. Hsieh, M.D.'s license?

Search the Oklahoma Board of Medical Licensure and Supervision at https://www.okmedicalboard.org/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Timothy M. Hsieh, M.D. prescribe under Medicare Part D?

In 2024, Timothy M. Hsieh, M.D. had 114 Medicare Part D claims for 34 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. Part D covers Medicare prescriptions only.

What is Timothy M. Hsieh, M.D.'s MIPS final score?

The 2023 MIPS final score is 78.8 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.

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.