Troy C. Thielen, PAC
Physician Assistant · Okemos, MI
Troy C. Thielen, PAC is a physician assistant with a practice address in Okemos, Michigan, and NPI 1720445810, issued on Jan 21, 2016. Check the license (Michigan 5601007643, as entered in NPPES) with the Michigan board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Troy C. Thielen
- Credential
- PAC
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 5601007643 MI
Self-reported in NPPES; status is on the state search - Practice location
- 2270 Jolly Oak RD, Okemos, MI 48864
- Phone
- (517) 975-9475
- Enumerated
- Jan 21, 2016
- Record last updated
- Jan 21, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (517) 975-9490
- Medicare enrollment
- Enrolled (PECOS I20160229001760); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 6,989 in Michigan → Look up another NPI →
Also registered at 2270 Jolly Oak RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Troy C. Thielen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Michigan board licenses this profession
Search for license 5601007643Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.3 times the Medicare Part D claims of the average physician assistant in 2024
3,531 Medicare Part D claims for 618 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Atorvastatin Calcium167 claims
- Levothyroxine Sodium145 claims
- Lisinopril135 claims
- Amlodipine Besylate129 claims
- Omeprazole104 claims
- Gabapentin82 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: $2,041.73
122 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 64,719 providers of this specialty with any payment received $841.65 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
- Sparrow Eaton HospitalCharlotte, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Troy C. Thielen among 6,989 physician assistant records in Michigan
Troy C. Thielen, PAC is one of 6,989 physician assistant records with a practice address in Michigan. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 48% of them.
- NPI issued2016 · 48% of these records are older, 48% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2015 · median 2017 among the 4,739 with a school on file
- Record last updated2016 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
27 physician assistant records list a practice address in Okemos
They are 27 of the 1,487 NPPES records with a practice address in Okemos, and 6,989 physician assistant records in Michigan.
All 6,989 in Michigan → Every provider in Okemos → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Elizabeth Brannick, PAOkemos, MI 488641073063392
- Jacob Clapper, PAOkemos, MI 488641730677238
- Holly Cook, PA-COkemos, MI 488641740726785
- Steven Fischer, D.C., PA-COkemos, MI 488641649288549
- Kenneth Gorney, PA-COkemos, MI 488641255380796
- Jessica Hill, PA-COkemos, MI 488641902016181
- Lance Kortesoja, PAOkemos, MI 488641114497930
- Adam Montero, PA-COkemos, MI 488641740412055
Common questions
What is Troy C. Thielen, PAC's NPI number?
Troy C. Thielen, PAC's National Provider Identifier (NPI) is 1720445810, issued on Jan 21, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Troy C. Thielen, PAC located?
The NPPES record lists a practice address at 2270 Jolly Oak RD, Okemos, MI, 48864. Phone: (517) 975-9475. Providers update this record themselves, so call before visiting.
How can I verify Troy C. Thielen, PAC's license?
NPPES lists Michigan license number 5601007643, as entered by the provider. Search the Michigan board that licenses this profession; the NPPES record confirms identity only.
How much does Troy C. Thielen, PAC prescribe under Medicare Part D?
In 2024, Troy C. Thielen, PAC had 3,531 Medicare Part D claims for 618 beneficiaries; the average among physician assistant prescribers was 830. 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.