What is Mark Johnson's NPI number?

Mark Johnson's National Provider Identifier (NPI) is 1235142357, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Mark Johnson's specialty?

Mark Johnson is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).

Where is Mark Johnson located?

Mark Johnson's practice location on file with NPPES is 620 John Paul Jones Cir, Portsmouth, VA 23708-2111.

What is Mark Johnson's phone number?

The practice phone number listed in the NPPES registry for Mark Johnson is (757) 953-2154.

Does Mark Johnson accept Medicare?

Mark Johnson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Mark Johnson's NPI active?

Yes — Mark Johnson's NPI (1235142357) is active in the NPPES registry as of the last update on 2024-09-24.

IndividualActiveAccepts Medicare

Mark Johnson, MD

NPI 1235142357 · Surgery Physician · Portsmouth, VA

Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Mark Johnson, MD is a Surgery Physician provider in Portsmouth, VA (NPI 1235142357).

Provider details

NPI number: 1235142357
Entity type: Individual
Primary specialty: Surgery PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Male
Sole proprietor: No
License: 2015-00091 (NC)

Specialties & taxonomies

Surgery PhysicianPrimary208600000XLicense 0101248712 (VA)
Allopathic & Osteopathic Physicians
Surgery Physician208600000XLicense 2015-00091 (NC)
Allopathic & Osteopathic Physicians

Profile Score

Detailed profile(76/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure25% of score
19 yrs in NPPES registry
Profile completeness25% of score
100% of core fields populated
Practice footprint15% of score
7 documented practice locations
Medicare service volume (vs. specialty peers)25% of score
39 Medicare services, 2024 (ranked within specialty)
Open Payments transparency10% of score
Has Open Payments disclosures (2024)

Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231	27	$47
Initial Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99221	12	$79

Typical Medicare-allowed amounts for these services range $47–$79 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$193 across 2 records (Open Payments 2024)

Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.

Practice location

620 John Paul Jones Cir

Portsmouth, VA 23708-2111

Phone: (757) 953-2154

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Mailing address