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DR. NATHANIEL W PARKER MD
NPI 1801118773
Anesthesiology in Belfast, ME

Active since February 19, 2010PECOS EnrolledAccepts Medicare Assignment
118 NORTHPORT AVE, BELFAST, ME 04915(207) 338-9345(207) 338-8600 Get Directions Write a Review

NPPES record last updated: March 31, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Mar 31, 2025, Feb 4, 2025 (2 updates tracked since 2025).

About Dr. Nathaniel W Parker Md NPPES

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

DR. NATHANIEL W PARKER MD (NPI 1801118773) is an individual anesthesiology provider in Belfast, Maine, licensed in Maine (MD28851) and active in the NPI registry since February 2010. He is enrolled in Medicare PECOS, maintains a secondary practice location in West Hollywood, and is a graduate of Eastern Virginia Medical School (2006).

NPPES Registry Identity

NPI1801118773
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. NATHANIEL W PARKERCredential: MD
Location Address118 NORTHPORT AVEBelfast, ME 04915-6009
Mailing Address118 Northport AveBelfast, ME 04915-6009 · (207) 338-9345 · Fax (207) 338-8600
Phone(207) 338-9345
Fax(207) 338-8600
Sole ProprietorNo
Medical School CMSEastern Virginia Medical SchoolGraduated 2006
Enumeration DateFebruary 19, 2010
Last NPPES UpdateMarch 31, 20252 updates tracked since enumeration
NPPES CertifiedMarch 31, 2025
✔ NPI 1801118773 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
Licenses✔ Licensed in ME · MD28851✔ Licensed in CA · A103730
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
118 NORTHPORT AVE, Belfast, ME 04915
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Secondary Practice Location 1

Location 18700 Beverly Blvd, Cedars Sinai Department of AnesthesiologyWest Hollywood, CA 90048-1804 · Phone (310) 423-1682 · Fax (310) 423-0387

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Nathaniel W Parker Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8426181884
PECOS Enrollment IDI20100805000382
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Nathaniel Parker reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mainehealth
Same address
Critical Access
118 NORTHPORT AVE
Belfast, ME 04915
  • Reassigned Medicare billing, Maine enrollment
  • Also billed through NPI 1265912075 (Maine)
  • 211 clinicians in this Medicare group
NPI 1841397932 (207) 338-2500
Southern Mono Health Care District
2,606 mi
Rural
221 TWIN LAKES ROAD
Bridgeport, CA 93517
  • Reassigned Medicare billing, California enrollment
  • Also billed through NPI 1962444059 (California)
  • 113 clinicians in this Medicare group
NPI 1821149816 (760) 932-7011

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 20

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

MICHAEL CALDER GILL PA-C
Physician Assistant
118 NORTHPORT AVE
BELFAST, ME 04915
Waldo County (207) 338-2500
BROOKE REED MS, RD, LD
Dietitian, Registered
118 NORTHPORT AVE
BELFAST, ME 04915
Waldo County (207) 930-2684
LILLIAN REDWINE DPT
Physical Therapist
118 NORTHPORT AVE
BELFAST, ME 04915
Waldo County (207) 505-4832
DANIELLE FOSSA
Speech-Language Pathologist
118 NORTHPORT AVE
BELFAST, ME 04915
Waldo County (207) 338-9349
MATTHEW SCOTT MOLISON DO
Family Medicine
118 NORTHPORT AVE
BELFAST, ME 04915
Waldo County (207) 930-6708
JAMES A STEVENSON MD
Psychiatry & Neurology (Neurology)
118 NORTHPORT AVE
BELFAST, ME 04915
Waldo County (207) 930-2695
MRS. LANAE J. MOLINE M.A., CCC-SLP/A
Speech-Language Pathologist
118 NORTHPORT AVE
BELFAST, ME 04915
Waldo County (207) 338-9349
DR. GREGORY RICHARD GROTZ M.D.
Radiology (Diagnostic Radiology)
118 NORTHPORT AVE
BELFAST, ME 04915
Waldo County (207) 784-2554

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 Nathaniel Parker's NPI number?

The NPI number for Nathaniel Parker is 1801118773. It was assigned to this individual provider in the NPPES registry on February 19, 2010.

Where is Nathaniel Parker located?

Nathaniel Parker practices at 118 Northport Ave, Belfast, ME 04915. The listed phone number is (207) 338-9345.

What is Nathaniel Parker's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Nathaniel Parker enrolled in Medicare?

Yes. Nathaniel Parker is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Nathaniel Parker's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nathaniel Parker reassigns Medicare benefits to 2 organizations: Mainehealth (Belfast, ME) and Southern Mono Health Care District (Bridgeport, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Nathaniel Parker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Nathaniel Parker was last updated on March 31, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.