Andrew Michael Toenniessen, DO
General Practice Physician · Herkimer, NY
Andrew Michael Toenniessen, DO is a general practice physician with a practice address in Herkimer, New York, and NPI 1518580612, issued on May 22, 2020. Check the license (New York 320513, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Andrew Michael Toenniessen
- Credential
- DO
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- 320513 NY
Self-reported in NPPES; status is on the state search - Practice location
- 104 N Washington St, Herkimer, NY 13350
- Phone
- (716) 807-9573
- Enumerated
- May 22, 2020
- Record last updated
- Jul 24, 2023
- Medicare enrollment
- Enrolled (PECOS I20230605002139); accepts Medicare assignment
- Medical or professional school
- Lake Erie Col Of Osteo Med At Seton Hill Univ, 2020
- Entity
- Type 1 · individual
Also registered at 104 N Washington St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Andrew Michael Toenniessen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 320513Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average general practice physician in 2024
6,258 Medicare Part D claims for 350 beneficiaries, against an average of 3,030 among the 8,395 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims. 199 claims were for opioids.
Most prescribed
- Gabapentin272 claims
- Eliquis196 claims
- Atorvastatin Calcium178 claims
- Levothyroxine Sodium157 claims
- Furosemide147 claims
- Metoprolol Succinate139 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 3 group practices
- Fresh Meadows Physician Practice PLLCLe Roy, NY
- Peyman Younesi MD PLLCNiagara Falls, NY
- PY Medical Services OF NY PLLCNiagara Falls, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
General Practice Physician providers in New York
There are 681 general practice physician records in New York.
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- Dare Adeyele, M.D.Bronx, NY1972849560
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Common questions
What is Andrew Michael Toenniessen, DO's NPI number?
Andrew Michael Toenniessen, DO's National Provider Identifier (NPI) is 1518580612, issued on May 22, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Andrew Michael Toenniessen, DO located?
The NPPES record lists a practice address at 104 N Washington St, Herkimer, NY, 13350. Phone: (716) 807-9573. Providers update this record themselves, so call before visiting.
How can I verify Andrew Michael Toenniessen, DO's license?
NPPES lists New York license number 320513, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Andrew Michael Toenniessen, DO prescribe under Medicare Part D?
In 2024, Andrew Michael Toenniessen, DO had 6,258 Medicare Part D claims for 350 beneficiaries; the average among general practice physician prescribers was 3,030. 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.