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JOHN MARSHALL KING MD
NPI 1790771269
Family Medicine in Haverhill, MA

Active since September 21, 2005PECOS Enrolled
1 PARK WAY, HAVERHILL, MA 01830(978) 521-3200(978) 557-8798 Get Directions Write a Review

NPPES record last updated: April 24, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About John Marshall King Md NPPES

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

JOHN MARSHALL KING MD (NPI 1790771269) is an individual family medicine provider in Haverhill, Massachusetts, licensed in Massachusetts (215349) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1790771269
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameJOHN MARSHALL KINGCredential: MD
Location Address1 PARK WAYHaverhill, MA 01830-6278
Mailing Address1 Park WayHaverhill, MA 01830-6278 · (978) 521-3200 · Fax (978) 557-8798
Phone(978) 521-3200
Fax(978) 557-8798
Sole ProprietorNo
Enumeration DateSeptember 21, 2005
Last NPPES UpdateApril 24, 2020
NPPES CertifiedApril 24, 2020
✔ NPI 1790771269 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in MA · 215349
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
1 PARK WAY, Haverhill, MA 01830
Open in Google Maps ↗

Other Identifiers 1

Medicaid0177415MA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

John Marshall King Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

4

Medicare enrollment records show John King reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mass General Brigham Community Physicians Inc.
1.2 mi
Internal Medicine
1 PARKWAY
Haverhill, MA 01830
  • Reassigned Medicare billing, Massachusetts enrollment
  • 350 clinicians in this Medicare group
NPI 1891112637 (978) 521-3200
Steward Medical Group, Inc
29 mi
Internal Medicine
500 BOYLSTON ST
Boston, MA 02116
  • Reassigned Medicare billing, Massachusetts enrollment
  • 138 clinicians in this Medicare group
NPI 1255600300 (615) 467-4158
Sturdy Memorial Hospital Inc
58 mi
General Acute Care Hospital
211 PARK ST
Attleboro, MA 02703
  • Reassigned Medicare billing, Massachusetts enrollment
  • 104 clinicians in this Medicare group
NPI 1730106162 (508) 236-8110
Regional Health Care Affiliates Inc
913 mi
Family Medicine
1600 BRECKENRIDGE ST, SUITE B
Owensboro, KY 42303
  • Reassigned Medicare billing, Kentucky enrollment
  • 42 clinicians in this Medicare group
NPI 1558743740 (270) 215-6436

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 01830 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$90.70 typical visit price
range $58.86 – $177.36
Typical copayment $22.67 (range $14.71 – $44.34)
Most-billed visit code 99203
Established Patient
$103.48 typical visit price
range $19.11 – $144.84
Typical copayment $25.87 (range $4.77 – $36.21)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 19

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

MASS GENERAL BRIGHAM MEDICAL GROUP NORTHERN MASSACHUSETTS INC
Clinical Medical Laboratory
1 PARK WAY, 3RD FL
HAVERHILL, MA 01830
Essex County (978) 521-3200
GEORGE F KWASS M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
1 PARK WAY
HAVERHILL, MA 01830
Essex County (978) 521-8680
PATHOLOGY ASSOCIATES, INC
Pathology (Anatomic Pathology & Clinical Pathology)
1 PARK WAY
HAVERHILL, MA 01830
Essex County (978) 469-5404
ASHLEY PAIGE THEROUX NP
Nurse Practitioner (Family)
1 PARK WAY
HAVERHILL, MA 01830
Essex County (888) 227-3762
DR. JASON M HEMMING M.D.
Internal Medicine (Gastroenterology)
1 PARK WAY
HAVERHILL, MA 01830
Essex County (978) 521-3235
SARAH JESSICA SANTANA PERKINS NP
Nurse Practitioner (Pediatrics)
1 PARK WAY
HAVERHILL, MA 01830
Essex County (888) 397-1105
JANA OETTINGER MD
Internal Medicine
1 PARK WAY
HAVERHILL, MA 01830
Essex County (978) 521-3270
DR. LIANA MICHAUD DO
Internal Medicine (Cardiovascular Disease)
1 PARK WAY
HAVERHILL, MA 01830
Essex County (978) 521-3200

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 John King's NPI number?

The NPI number for John King is 1790771269. It was assigned to this individual provider in the NPPES registry on September 21, 2005.

Where is John King located?

John King practices at 1 Park Way, Haverhill, MA 01830. The listed phone number is (978) 521-3200.

What is John King's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is John King enrolled in Medicare?

Yes. John King is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for John King's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John King reassigns Medicare benefits to 4 organizations: Mass General Brigham Community Physicians Inc. (Haverhill, MA), Steward Medical Group, Inc (Boston, MA), Sturdy Memorial Hospital Inc (Attleboro, MA) and Regional Health Care Affiliates Inc (Owensboro, KY). 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 John King'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 John King was last updated on April 24, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years 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.