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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. DAVID J MAST MD
NPI 1912958331
Internal Medicine in Duluth, MN

Active since May 12, 2006PECOS Enrolled
1001 E SUPERIOR ST, STE L401, DULUTH, MN 55802(218) 249-7960 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. David J Mast Md NPPES

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

DR. DAVID J MAST MD (NPI 1912958331) is an individual internal medicine provider in Duluth, Minnesota, licensed in Minnesota (30485) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Essentia Health Duluth, and is a graduate of University Of Minnesota Medical School (1985).

NPPES Registry Identity

NPI1912958331
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. DAVID J MASTCredential: MD
Location Address1001 E SUPERIOR ST, STE L401Duluth, MN 55802-2207
Mailing Address1001 E Superior St, Ste L401Duluth, MN 55802-2207 · (218) 249-7960
Phone(218) 249-7960
Sole ProprietorNo
Medical School CMSUniversity Of Minnesota Medical SchoolGraduated 1985
Enumeration DateMay 12, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1912958331 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MN · 30485
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
1001 E SUPERIOR ST, Duluth, MN 55802
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include HealthPartners, Medica, Security Health Plan.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. David J Mast 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 ID4688586258
PECOS Enrollment IDI20100116000265
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.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
88 services66 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
75 services28 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
72 services72 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
37 services35 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
33 services32 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
27 services19 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Essentia Health Duluth

Acute Care Hospitals · Duluth, MN
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number240019
Location502 East Second StreetDuluth, MN 55805 · St. Louis County
Birthing friendly

St Lukes Hospital

Acute Care Hospitals · Duluth, MN
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number240047
Location915 East 1st StreetDuluth, MN 55805 · St. Louis County
Emergency services Birthing friendly

Lake View Memorial Hospital

Critical Access Hospitals · Two Harbors, MN
OwnershipVoluntary non-profit - Private
CMS Certification Number241308
Location325 Eleventh AveTwo Harbors, MN 55616 · Lake County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 55802 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
$127.61 typical visit price
range $56.00 – $168.28
Typical copayment $31.90 (range $14.00 – $42.07)
Most-billed visit code 99204
Established Patient
$98.61 typical visit price
range $18.32 – $138.04
Typical copayment $24.65 (range $4.58 – $34.51)
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.

Referred Medical Equipment & Supplies CMS DME claims 14

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
11 suppliers44 claims115 services$5.85 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
4 suppliers19 claims26 services$1.04 avg. paid by Medicare
Urinary catheter anchoring device, leg strap, each A4334
DME-Orthotic Devices · category DF000N
3 suppliers13 claims13 services$3.65 avg. paid by Medicare
Bedside drainage bag, day or night, with or without anti-reflux device, with or without tube, each A4357
DME-Orthotic Devices · category DF000N
4 suppliers27 claims40 services$8.42 avg. paid by Medicare
Urinary drainage bag, leg or abdomen, vinyl, with or without tube, with straps, each A4358
DME-Orthotic Devices · category DF000N
3 suppliers15 claims29 services$5.12 avg. paid by Medicare
Ostomy skin barrier, solid 4 x 4 or equivalent, extended wear, without built-in convexity, each A4385
DME-Orthotic Devices · category DF010N
1 supplier11 claims110 services$4.46 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

MR. BRIAN ANTHONY BUTKUS PA-C
Physician Assistant
1001 E SUPERIOR ST, SUITE L201
DULUTH, MN 55802
St. Louis County (218) 249-3057
DR. JUDITH GOODRICH ARVOLD MD
Internal Medicine
1001 E SUPERIOR ST, SUITE L401
DULUTH, MN 55802
St. Louis County (218) 249-7960
DR. JAKE RICHARD POWELL MD
Hospitalist
1001 E SUPERIOR ST, SUITE L401
DULUTH, MN 55802
St. Louis County (218) 249-7960
ANNE CHANDRI DEEPIKA SILVA-BENEDICT MD
Internal Medicine (Hematology & Oncology)
1001 E SUPERIOR ST, STE. L101
DULUTH, MN 55802
St. Louis County (218) 249-3081
DR. JOHN M VANETTA MD
Internal Medicine
1001 E SUPERIOR ST, STE L401
DULUTH, MN 55802
St. Louis County (218) 249-7960
LISA JEAN HUGHES NP
Nurse Practitioner
1001 E SUPERIOR ST, STE. 201
DULUTH, MN 55802
St. Louis County (218) 249-3057
LINDSAY MARIE JOHNSON FNP-C
Nurse Practitioner (Family)
1001 E SUPERIOR ST, DULUTH
DULUTH, MN 55802
St. Louis County (218) 249-3081
MS. SHERRY A JOHNSON C-FNP, CNS
Nurse Practitioner
1001 E SUPERIOR ST, STE, L201
DULUTH, MN 55802
St. Louis County (218) 249-7990

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 David Mast's NPI number?

The NPI number for David Mast is 1912958331. It was assigned to this individual provider in the NPPES registry on May 12, 2006.

Where is David Mast located?

David Mast practices at 1001 E Superior St Ste L401, Duluth, MN 55802. The listed phone number is (218) 249-7960.

What is David Mast's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is David Mast enrolled in Medicare?

Yes. David Mast 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.

What insurance does David Mast accept?

Health plans from HealthPartners, Medica and Security Health Plan list David Mast 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.

Is David Mast affiliated with any hospitals?

According to CMS data, David Mast is affiliated with Essentia Health Duluth, St Lukes Hospital and Lake View Memorial Hospital.

When was this NPI record last updated?

The NPPES record for David Mast was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 29 days 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.