Individual provider

Matthew Grier, D.O.

Physical Medicine & Rehabilitation Physician Medicare enrolled

Matthew Grier, D.O. is a Physical Medicine & Rehabilitation Physician in Auburn, NY, registered under NPI 1871536417. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.

Getting there

The practice address on file is 20 PARK AVE, Auburn, NY 13021. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.

20 PARK AVE, Auburn, NY 13021 Open in Google Maps →

Credentials and Medicare

State licence
LicenceStateSpecialty
1848 ME Physical Medicine & Rehabilitation…
241271 NY Physical Medicine & Rehabilitation… primary

Licences are recorded in 2 states: ME, NY. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.

Medicare (PECOS)
Status
Approved
Provider type
Practitioner - Physical Medicine And Rehabilitation
PAC ID
8224002423
Enrollment ID
I20070508000318

Medicare enrolment is recorded as approved under the provider type Practitioner - Physical Medicine And Rehabilitation. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.

Licensed in 2 states

This provider holds licences in 2 states: Maine and New York. The practice address on file is in Auburn, NY, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.

ME Maine
Licence
1848
Specialty
Physical Medicine & Rehabilitation…
Verify with the ME board →
NY New York practice address
Licence
241271
Specialty
Physical Medicine & Rehabilitation…
Verify with the NY board →

Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.

What Physical Medicine & Rehabilitation covers

Physical medicine and rehabilitation, also referred to as rehabilitation medicine, is the medical specialty concerned with diagnosing, evaluating, and treating patients with physical disabilities. These disabilities may arise from conditions affecting the musculoskeletal system such as neck and back pain, sports injuries, or other painful conditions affecting the limbs, such as carpal tunnel syndrome. Alternatively, the disabilities may result from neurological trauma or disease such as spinal cord injury, head injury or stroke. A physician certified in physical medicine and rehabilitation is often called a physiatrist. The primary goal of the physiatrist is to achieve maximal restoration of physical, psychological, social and vocational function through comprehensive rehabilitation. Pain management is often an important part of the role of the physiatrist. For diagnosis and evaluation, a physiatrist may include the techniques of electromyography to supplement the standard history, physical, x-ray and laboratory examinations. The physiatrist has expertise in the appropriate use of therapeutic exercise, prosthetics (artificial limbs), orthotics and mechanical and electrical devices. NUCC Health Care Provider Taxonomy, code 208100000X
Allopathic & Osteopathic Physicians Physical Medicine & Rehabilitation

All registered taxonomy codes

This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.

CodeSpecialtyLicenceState
208100000X Physical Medicine & Rehabilitation Physician 1848 ME
208100000X Physical Medicine & Rehabilitation Physician 241271 NY primary

The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.

Full NPPES record

An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.

NPI1871536417 valid check digit
Entity typeIndividual (NPI-1)
Enumeration dateJun 13, 2006
Last updatedDec 9, 2025
StatusActive
Sole proprietorYes
GenderMale
CredentialD.O.
Practice address 20 PARK AVE
Auburn, NY 13021
(872) 231-3162
Fax (702) 977-1496
Mailing address PO BOX 22239
New York, NY 10087
Other identifiers CC8362 · Other (NY)
CC9269 · Other (PA)
GU039851 · Other (PA)
P00362291 · Other (NY)
P00362291 · Other (PA)
This record was updated on Dec 9, 2025, which is recent enough that the contact details are likely still accurate.

Number check

1871536417 passes the NPI check digit test The final digit 7 matches the value computed from the first nine digits, so this is a well-formed NPI.
How the check works, step by step

Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.

Digit 8 0 8 4 0 1 8 7 1 5 3 6 4 1
Doubled? ×2 ×2 ×2 ×2 ×2 ×2 ×2
Value 8 0 8 8 0 2 8 5 1 1 3 3 4 2

Sum = 53 · next multiple of 10 = 60 · check digit = 7 · actual last digit = 7

A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.

Common questions

What is NPI number 1871536417?
NPI 1871536417 is the National Provider Identifier assigned to Matthew Grier, D.O. in Auburn, NY. It is a 10-digit number issued by the Centers for Medicare & Medicaid Services and used on claims, referrals, and prescriptions to identify the provider.
What does Physical Medicine & Rehabilitation Physician cover?
Physical medicine and rehabilitation, also referred to as rehabilitation medicine, is the medical specialty concerned with diagnosing, evaluating, and treating patients with physical disabilities. These disabilities may arise from conditions affecting the musculoskeletal system such as neck and back pain, sports…
How do I contact Matthew Grier, D.O.?
The phone number on file with NPPES is (872) 231-3162, last updated Dec 9, 2025. Because NPPES is only updated when a provider files a change, call ahead to confirm the number and the current practice address before visiting.
Does Matthew Grier, D.O. accept Medicare?
This NPI has an approved Medicare enrolment in PECOS, which means the provider is enrolled to bill Medicare. Enrolment does not guarantee they are accepting new Medicare patients — verify directly with the office.
Is NPI 1871536417 a valid number?
Yes. 1871536417 passes the Luhn check digit validation that CMS uses for NPI numbers, and it resolves to an active record in the registry.
How to use this page. Everything here comes from public federal records. Tips Health does not verify quality of care, confirm that a licence is currently active, or check malpractice history, and accepts no fees for placement. A listing is not a recommendation. Verify independently before seeking care.