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MR. GREGORY JOHN ESMER DO
NPI 1891871455
Neuromusculoskeletal Medicine & OMM in Portland, OR

Active since October 27, 2006Opted out of Medicare · through Sep 7, 2026
4039 N MISSISSIPPI AVE STE 203, PORTLAND, OR 97227(503) 970-2303(503) 719-7591 Get Directions Write a Review

NPPES record last updated: January 13, 2012. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Mr. Gregory John Esmer Do NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MR. GREGORY JOHN ESMER DO (NPI 1891871455) is an individual neuromusculoskeletal medicine & omm provider in Portland, Oregon, licensed in Oregon (DO26929) and active in the NPI registry since October 2006. He has opted out of Medicare through September 7, 2026 and remains eligible to order and refer.

NPPES Registry Identity

NPI1891871455
Entity TypeIndividualMale
Primary Taxonomy204D00000X
Provider Legal NameMR. GREGORY JOHN ESMERCredential: DO
Location Address4039 N MISSISSIPPI AVE STE 203Portland, OR 97227-1477
Mailing Address4039 N Mississippi Ave Ste 203Portland, OR 97227-1477 · (503) 970-2303 · Fax (503) 719-7591
Phone(503) 970-2303
Fax(503) 719-7591
Sole ProprietorYes
Enumeration DateOctober 27, 2006
Last NPPES UpdateJanuary 13, 2012
✔ NPI 1891871455 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNeuromusculoskeletal Medicine & OMMAllopathic & Osteopathic Physicians
Taxonomy Code204D00000X
License✔ Licensed in OR · DO26929
Definition
The Neuromusculoskeletal Medicine and Osteopathic Manipulative Medicine physician directs special attention to the neuromusculoskeletal system and its interaction with other body systems. Neuromusculoskeletal Medicine and Osteopathic Manipulative Medicine encompasses increased knowledge and understanding of osteopathic principles and practice and heightened technical skills of osteopathic manipulative medicine, and integrates each of these into the management of pediatric, adolescent, adult, and geriatric patients.
Also ListedGeneral PracticeTaxonomy 208D00000X · License D026929 (OR), 1826 (ME)
4039 N MISSISSIPPI AVE STE 203, Portland, OR 97227
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

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Opted out of Medicare

Mr. Gregory John Esmer Do has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from September 7, 2016 through September 7, 2026.

Opt-Out Effective DateSeptember 7, 2016
Opt-Out In Effect ThroughSeptember 7, 2026Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

OSTEOPATHIC PDX, P.C.
Neuromusculoskeletal Medicine & OMM
4039 N MISSISSIPPI AVE STE 203
PORTLAND, OR 97227
Multnomah County (503) 970-2303

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gregory Esmer's NPI number?

The NPI number for Gregory Esmer is 1891871455. It was assigned to this individual provider in the NPPES registry on October 27, 2006.

Where is Gregory Esmer located?

Gregory Esmer practices at 4039 N Mississippi Ave Ste 203, Portland, OR 97227. The listed phone number is (503) 970-2303.

What is Gregory Esmer's specialty?

The primary specialty registered for this NPI is Neuromusculoskeletal Medicine & OMM with taxonomy code 204D00000X.

Is Gregory Esmer enrolled in Medicare?

No. Gregory Esmer has opted out of Medicare through September 7, 2026. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

What insurance does Gregory Esmer accept?

Health plans from Providence Health Plan list Gregory Esmer as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Gregory Esmer was last updated on January 13, 2012. NPI Profile syncs with the weekly NPPES data releases published by CMS; the most recent full sync was completed on July 26, 2026. Anyone can also request an on-demand re-check of this record against the live CMS registry, directly from this page.