Active NPI 1912958331 Individual Practitioner Male Practitioner

Dr. David J Mast , MD

Internal Medicine • Duluth, MN

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. David Mast, MD is a certified Internal Medicine practicing in Duluth, MN. With approximately 41 years of clinical experience since graduating from University Of Minnesota Medical School in 1985, Dr. Mast delivers high-quality medical care to the local community at 1001 E SUPERIOR ST.

Dr. Mast maintains professional affiliations with St. Luke'S Hospital Of Duluth, Polinsky Medical Rehabilitation Center and accepts Medicare assignment.

Frequently performed procedures and clinical services include established patient outpatient office visit, subsequent hospital care with moderate levelof medical decision making, if using time, at least, annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

1001 E Superior St
Ste L401

Duluth, MN 558022207

Telephone 2182497960

Associated Practice Facility / Clinic

🏢 St. Luke's Hospital Of Duluth Facility NPI 1417909870

Medicare Profile & Education

Medical School

University Of Minnesota Medical School

Graduation Year

1985

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Duluth, MN

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

41 Yrs +19.4 yrs vs City Avg

City Avg: 21.6 Yrs

State Avg: 23.6 Yrs

Regional Practice Density

68 Specialists

Practicing in Duluth, MN (2726 Statewide)

Telehealth Adoption Rate

19.1% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

61.3% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Mast (41 Years) 41 Yrs

Duluth Specialty Average (21.6 Years) 21.6 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	88	66	$125.61	$94.35
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	75	28	$343.76	$114.83
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	72	72	$287.21	$130.25
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	37	35	$42.92	$34.00
99213 Established patient office or other outpatient visit, typically 15 minutes	33	32	$85.61	$63.93
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	27	19	$245.85	$76.43
99239 Hospital discharge day management, more than 30 minutes	16	16	$415.81	$111.79
99238 Hospital discharge day management, 30 minutes or less	14	14	$275.57	$79.17

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	143	77	$107.94	$95.13
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	102	33	$320.00	$116.05
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	64	64	$247.00	$128.92
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	60	30	$234.00	$77.13
99213 Established patient office or other outpatient visit, typically 15 minutes	57	46	$97.05	$64.27
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	56	55	$39.82	$34.46
99239 Hospital discharge day management, more than 30 minutes	37	27	$325.00	$111.94
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	12	12	$598.00	$169.19

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	168	88	$103.21	$95.90
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	152	61	$310.00	$99.06
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	151	54	$225.00	$68.86
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	68	68	$239.00	$129.23
99213 Established patient office or other outpatient visit, typically 15 minutes	67	54	$80.94	$64.88
99239 Hospital discharge day management, more than 30 minutes	33	30	$315.00	$102.00
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	31	29	$46.58	$34.89
99238 Hospital discharge day management, 30 minutes or less	17	17	$215.00	$69.50
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	14	14	$580.00	$190.97

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	227	99	$105.71	$96.82
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	161	53	$305.00	$101.33
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	114	39	$217.00	$70.46
99231 Follow-up hospital inpatient care per day, typically 15 minutes	83	13	$118.00	$37.70
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	75	75	$239.00	$132.88
99213 Established patient office or other outpatient visit, typically 15 minutes	61	51	$77.62	$65.51
99239 Hospital discharge day management, more than 30 minutes	38	30	$310.00	$104.81
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	35	35	$35.00	$35.20
99238 Hospital discharge day management, 30 minutes or less	14	14	$212.00	$71.10
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	13	13	$136.00	$137.11
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	12	11	$580.00	$196.18

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	269	102	$292.00	$103.49
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	178	110	$86.27	$78.76
99213 Established patient office or other outpatient visit, typically 15 minutes	75	64	$71.00	$51.03
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	75	38	$210.00	$72.56
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	61	61	$213.90	$117.14
99239 Hospital discharge day management, more than 30 minutes	53	45	$296.00	$107.52
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	19	19	$559.00	$195.79

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	298	155	$83.29	$77.80
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	178	51	$291.29	$101.15
99213 Established patient office or other outpatient visit, typically 15 minutes	66	55	$55.03	$50.35
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	49	49	$213.90	$116.25
99239 Hospital discharge day management, more than 30 minutes	36	31	$278.94	$104.57
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	32	22	$203.50	$71.64
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	14	13	$479.00	$191.04

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	361	167	$81.70	$76.72
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	159	55	$190.00	$70.94
99213 Established patient office or other outpatient visit, typically 15 minutes	158	140	$55.56	$50.12
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	124	124	$213.90	$115.19
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	39	23	$272.00	$101.65
99239 Hospital discharge day management, more than 30 minutes	16	14	$242.00	$105.73
99238 Hospital discharge day management, 30 minutes or less	12	12	$168.00	$71.57

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	315	146	$81.60	$76.53
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	186	68	$188.00	$70.29
99213 Established patient office or other outpatient visit, typically 15 minutes	93	78	$52.80	$49.57
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	38	38	$213.90	$113.98
99231 Follow-up hospital inpatient care per day, typically 15 minutes	21	12	$104.50	$38.02
99238 Hospital discharge day management, 30 minutes or less	19	18	$167.00	$70.93

Medical Specialties & State Licenses

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License MN 30485

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.

Hospital & Practice Group Affiliations

St. Luke's Hospital Of Duluth

1015 E 1st St, Duluth, MN 558052242

Phone: 2182497860

Polinsky Medical Rehabilitation Center

1600 Miller Trunk Hwy, Duluth, MN 558115640

Phone: 2187865360

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

32 Associated Practitioners

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Doctor of Medicine (M.D.)

Dr. Jake Powell , MD

Hospitalist

NPI 1043260524

Doctor of Medicine (M.D.)

Dr. John Vanetta , MD

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NPI 1134179971

Doctor of Medicine (M.D.)

Dr. Christine Redmann , DO

Family Medicine

NPI 1184715203

Doctor of Osteopathic Medicine (D.O.)

Dr. Timothy Kleinschmidt , MD

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NPI 1245280601

Doctor of Medicine (M.D.)

Dr. Shawn Pritchard , MD

Internal Medicine

NPI 1245676683

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events

✅

NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

📍

Updated Practice Location July 08, 2007

Registered at 1001 E SUPERIOR ST, STE L401, DULUTH, MN 558022207 (Tel: 2182497960)

📍

Updated Business Mailing Address July 08, 2007

Registered at 1001 E SUPERIOR ST, STE L401, DULUTH, MN 558022207 (Tel: 2182497960)

👤

Provider Name / Credentials Updated July 08, 2007

Recorded as DAVID MAST, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

Internal Medicine (License #30485 in MN)

🟢

Initial NPI Registration & Enumeration May 12, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

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NPI Administrative Meta

NPI Number: 1912958331

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: May 12, 2006

Last Update: July 13, 2026

Sole Proprietor: No

Update or Correct Profile

Mailing Address

1001 E Superior St, Ste L401

Duluth, MN 558022207

Phone: 2182497960

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.