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MARK PORWAY MD
NPI 1992765036
Internal Medicine - Cardiovascular Disease in Northampton, MA

Active since March 24, 2006PECOS Enrolled
22 ATWOOD DR, SUITE 301, NORTHAMPTON, MA 01060(413) 570-4900(413) 570-4196 Get Directions Write a Review

NPPES record last updated: April 15, 2015. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Mark Porway Md NPPES

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

MARK PORWAY MD (NPI 1992765036) is an individual cardiovascular disease provider in Northampton, Massachusetts, licensed in Massachusetts (58063) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1992765036
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameMARK PORWAYCredential: MD
Location Address22 ATWOOD DR, SUITE 301Northampton, MA 01060-4272
Mailing Address22 Atwood Dr, Suite 301Northampton, MA 01060-4272 · (413) 570-4900 · Fax (413) 570-4196
Phone(413) 570-4900
Fax(413) 570-4196
Sole ProprietorNo
Enumeration DateMarch 24, 2006
Last NPPES UpdateApril 15, 2015
✔ NPI 1992765036 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in MA · 58063
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
22 ATWOOD DR, Northampton, MA 01060
Open in Google Maps ↗

Other Identifiers 15

Other04-3476949MA · Plan Vista
Other058063MA · Tufts
Medicare UPINB98052
Other04-3476949MA · Phcs
Other04-3476949MA · Consolidated
Other04-3476949MA · Health New England
Other04-3476949MA · North American Preferred
Other04-3476949MA · Unicare/gic
OtherJ06661MA · Bcbsma
Other04-3476949MA · Northeast Healthcare Alli
Other15514MA · Health New England
Medicaid110044797AMA
Other04-3476949MA · Northeast Health Direct
Medicaid3025365MA
Medicare PINS400189891MA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark Porway 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

2

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

Cooley Dickinson Hospital Inc
2.4 mi
General Acute Care Hospital
30 LOCUST ST
Northampton, MA 01060
  • Reassigned Medicare billing, Massachusetts enrollment
  • 158 clinicians in this Medicare group
NPI 1477596310 (413) 582-2000
Mass General Brigham Medical Group Western Massachusetts Inc
2.4 mi
Family Medicine
30 LOCUST ST
Northampton, MA 01060
  • Reassigned Medicare billing, Massachusetts enrollment
  • 539 clinicians in this Medicare group
NPI 1295787919 (413) 582-2898

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 01060 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
$134.47 typical visit price
range $58.86 – $177.36
Typical copayment $33.61 (range $14.71 – $44.34)
Most-billed visit code 99204
Established Patient
$73.22 typical visit price
range $19.11 – $144.84
Typical copayment $18.30 (range $4.77 – $36.21)
Most-billed visit code 99213
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 20

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

JAMES B. KIRCHHOFFER MD
Internal Medicine (Cardiovascular Disease)
22 ATWOOD DR, SUITE 301
NORTHAMPTON, MA 01060
Hampshire County (413) 570-4900
PRESENCE & PEACE PSYCHIATRY PLLC
Nurse Practitioner (Psychiatric/Mental Health)
22 ATWOOD DR
NORTHAMPTON, MA 01060
Hampshire County (413) 239-2062
JESSICA DAWICKI RD
Dietitian, Registered
22 ATWOOD DR
NORTHAMPTON, MA 01060
Hampshire County (413) 586-1601
VI VIEN KHOO RDN
Dietitian, Registered
22 ATWOOD DR
NORTHAMPTON, MA 01060
Hampshire County (413) 586-2198
STEVEN B WEINSIER MD
Internal Medicine (Cardiovascular Disease)
22 ATWOOD DR, SUITE 301
NORTHAMPTON, MA 01060
Hampshire County (413) 570-4900
TERESA I KLICH-NOWAK M.D.
Internal Medicine (Rheumatology)
22 ATWOOD DR, SUITE 203
NORTHAMPTON, MA 01060
Hampshire County (413) 584-9511
HAMPSHIRE CARDIOVASCULAR ASSOCIATES, LLC
Internal Medicine (Cardiovascular Disease)
22 ATWOOD DR
NORTHAMPTON, MA 01060
Hampshire County (413) 570-4900
MICHELLE K LEMME
Nurse Practitioner (Family)
22 ATWOOD DR
NORTHAMPTON, MA 01060
Hampshire County (413) 586-1601

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 Mark Porway's NPI number?

The NPI number for Mark Porway is 1992765036. It was assigned to this individual provider in the NPPES registry on March 24, 2006.

Where is Mark Porway located?

Mark Porway practices at 22 Atwood Dr Suite 301, Northampton, MA 01060. The listed phone number is (413) 570-4900.

What is Mark Porway's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Mark Porway enrolled in Medicare?

Yes. Mark Porway is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Mark Porway's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Porway reassigns Medicare benefits to 2 organizations: Cooley Dickinson Hospital Inc (Northampton, MA) and Mass General Brigham Medical Group Western Massachusetts Inc (Northampton, MA). 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 Mark Porway'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 Mark Porway was last updated on April 15, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.