Active NPI 1255564837 Individual Practitioner Male Practitioner

Dr. Steven I Master , MD

Internal Medicine • Cambridge, MA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Steven Master, MD is a certified Internal Medicine practicing in Cambridge, MA. With approximately 18 years of clinical experience since graduating from New York Medical College in 2008, Dr. Master delivers high-quality medical care to the local community at 330 MOUNT AUBURN ST.

Dr. Master is affiliated with Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc and accepts Medicare assignment.

Frequently performed procedures and clinical services include subsequent hospital care with moderate levelof medical decision making, if using time, at least, hospital discharge day management, more than, follow-up hospital inpatient care per day. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

330 Mount Auburn St

Cambridge, MA 021385502

Telephone 6174995112

Associated Practice Facility / Clinic

🏢 Mount Auburn Hospital Facility NPI 1689670259

Medicare Profile & Education

Medical School

New York Medical College

Graduation Year

2008

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Cambridge, MA

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

18 Yrs -4.6 yrs vs City Avg

City Avg: 22.6 Yrs

State Avg: 29.3 Yrs

Regional Practice Density

309 Specialists

Practicing in Cambridge, MA (7127 Statewide)

Telehealth Adoption Rate

23.9% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

67.0% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Master (18 Years) 18 Yrs

Cambridge Specialty Average (22.6 Years) 22.6 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
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	324	179	$368.49	$123.60
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	313	167	$245.27	$82.36
99239 Hospital discharge day management, more than 30 minutes	138	136	$353.70	$120.53
99231 Follow-up hospital inpatient care per day, typically 15 minutes	72	11	$153.00	$51.57
99238 Hospital discharge day management, 30 minutes or less	48	48	$254.25	$85.50
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	44	44	$584.82	$180.41
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	36	36	$403.78	$136.20

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	463	203	$173.85	$83.82
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	395	178	$247.80	$125.98
99239 Hospital discharge day management, more than 30 minutes	121	119	$262.27	$122.72
99231 Follow-up hospital inpatient care per day, typically 15 minutes	61	18	$107.51	$52.55
99238 Hospital discharge day management, 30 minutes or less	56	54	$154.29	$86.67
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	46	46	$294.63	$138.29
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	20	20	$468.00	$184.45

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	423	184	$205.00	$109.66
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	276	127	$142.00	$75.88
99239 Hospital discharge day management, more than 30 minutes	91	83	$211.00	$113.65
99238 Hospital discharge day management, 30 minutes or less	61	61	$145.00	$77.82
99217 Hospital observation care on day of discharge	39	37	$143.00	$77.35
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	37	37	$398.00	$212.17
99219 Hospital observation care, typically 50 minutes	26	25	$267.00	$141.68
99226 Subsequent observation care, typically 35 minutes per day	20	17	$207.00	$108.26
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	20	19	$269.00	$144.46
99225 Subsequent observation care, typically 25 minutes per day	16	16	$143.00	$75.96

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	461	191	$205.00	$111.74
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	261	124	$142.00	$77.74
99239 Hospital discharge day management, more than 30 minutes	109	103	$211.00	$116.18
99238 Hospital discharge day management, 30 minutes or less	70	67	$145.00	$78.88
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	29	28	$398.00	$216.68
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	25	24	$269.00	$147.04
99219 Hospital observation care, typically 50 minutes	24	23	$267.00	$145.12
99217 Hospital observation care on day of discharge	21	21	$143.00	$78.88
99225 Subsequent observation care, typically 25 minutes per day	20	15	$143.00	$77.74
99226 Subsequent observation care, typically 35 minutes per day	18	18	$207.00	$111.74

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	405	181	$205.00	$113.47
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	171	95	$142.00	$78.50
99239 Hospital discharge day management, more than 30 minutes	98	91	$211.00	$117.71
99238 Hospital discharge day management, 30 minutes or less	43	43	$145.00	$80.51
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	25	25	$269.00	$150.50
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	24	24	$398.00	$220.92
99219 Hospital observation care, typically 50 minutes	18	18	$267.00	$142.21
99217 Hospital observation care on day of discharge	18	18	$143.00	$76.72

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	438	183	$205.00	$111.47
99239 Hospital discharge day management, more than 30 minutes	121	119	$211.00	$115.94
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	105	59	$142.00	$77.24
99217 Hospital observation care on day of discharge	45	45	$143.00	$79.20
99226 Subsequent observation care, typically 35 minutes per day	35	28	$207.00	$112.60
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	32	31	$398.00	$217.18
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	28	28	$269.00	$147.08
99219 Hospital observation care, typically 50 minutes	27	27	$267.00	$146.06
99238 Hospital discharge day management, 30 minutes or less	24	24	$145.00	$79.12
99225 Subsequent observation care, typically 25 minutes per day	17	15	$143.00	$78.51

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	411	176	$200.96	$110.05
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	159	92	$139.80	$76.91
99239 Hospital discharge day management, more than 30 minutes	112	107	$207.52	$113.81
99238 Hospital discharge day management, 30 minutes or less	45	44	$145.00	$77.94
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	45	45	$383.69	$214.27
99217 Hospital observation care on day of discharge	35	34	$142.23	$77.86
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	30	30	$266.20	$144.38
99219 Hospital observation care, typically 50 minutes	25	25	$267.00	$143.75
99226 Subsequent observation care, typically 35 minutes per day	18	16	$197.33	$111.09

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	467	187	$184.00	$107.86
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	217	106	$128.00	$74.64
99239 Hospital discharge day management, more than 30 minutes	147	140	$185.00	$112.23
99217 Hospital observation care on day of discharge	53	53	$134.00	$76.03
99225 Subsequent observation care, typically 25 minutes per day	39	30	$100.00	$75.46
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	36	34	$302.61	$208.66
99238 Hospital discharge day management, 30 minutes or less	34	33	$145.00	$75.73
99226 Subsequent observation care, typically 35 minutes per day	26	21	$149.00	$108.76
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	21	20	$241.00	$141.34
99219 Hospital observation care, typically 50 minutes	21	21	$267.00	$140.42
99220 Hospital observation care, typically 70 minutes	13	13	$366.00	$192.02

Medical Specialties & State Licenses

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License MA 248246

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.

Student in an Organized Health Care Education/Training Program

NUCC Taxonomy Code: 390200000X

An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.

Hospital & Practice Group Affiliations

Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc

330 Brookline Ave, Boston, MA 022155400

Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc

330 Brookline Ave, Boston, MA 022155400

Phone: 6177548612

Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc

330 Mount Auburn St, Cambridge, MA 021385502

Phone: 7819839088

Practice Associates & Co-Workers

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

19 Associated Practitioners

Dr. Auddri Rahman , MD

Internal Medicine

NPI 1043798499

Doctor of Medicine (M.D.)

Eric Flint

Internal Medicine

NPI 1083616395

Dr. Christopher Dennis , MD

Internal Medicine

NPI 1255362505

Doctor of Medicine (M.D.)

Dr. Deirdre Woods , MD

Internal Medicine

NPI 1306848528

Doctor of Medicine (M.D.)

Dr. Frederic Celestin , MD

Internal Medicine

NPI 1417173436

Doctor of Medicine (M.D.)

Dr. Janine Mccauley , MD

Internal Medicine

NPI 1487656617

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 September 03, 2014

NPI status registered as active in NPPES database

📍

Updated Practice Location September 03, 2014

Registered at 330 MOUNT AUBURN ST, CAMBRIDGE, MA 021385502 (Tel: 6174995112)

📍

Updated Business Mailing Address September 03, 2014

Registered at 330 MOUNT AUBURN ST, CAMBRIDGE, MA 021385502 (Tel: 6174995112)

👤

Provider Name / Credentials Updated September 03, 2014

Recorded as STEVEN MASTER, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) September 03, 2014

Internal Medicine (License #248246 in MA)

🟢

Initial NPI Registration & Enumeration August 28, 2009

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1255564837

Entity Type:

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

Enumeration Date: August 28, 2009

Last Update: September 03, 2014

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

330 Mount Auburn St

Cambridge, MA 021385502

Phone: 6174995112

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.