Active NPI 1922411867 Individual Practitioner Female Practitioner

Dr. Nancy C Haff , MD

Internal Medicine • Wellesley, MA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Nancy Haff, MD is a certified Internal Medicine practicing in Wellesley, MA. With approximately 12 years of clinical experience since completing medical education in 2014, Dr. Haff delivers high-quality medical care to the local community at 70 HASTINGS ST STE 200.

Dr. Haff is affiliated with Massachusetts General Physicians Organization Inc and accepts Medicare assignment.

Frequently performed procedures and clinical services include insertion of needle into vein for collection of blood sample, annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit, established patient outpatient office visit. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

70 Hastings St Ste 200

Wellesley, MA 024815439

Telephone 7817728600

Fax 7817725600

Medicare Profile & Education

Medical School

Other

Graduation Year

2014

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Wellesley, MA

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

12 Yrs -17.8 yrs vs City Avg

City Avg: 29.8 Yrs

State Avg: 29.3 Yrs

Regional Practice Density

82 Specialists

Practicing in Wellesley, MA (7127 Statewide)

Telehealth Adoption Rate

54.9% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

73.5% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Haff (12 Years) 12 Yrs

Wellesley Specialty Average (29.8 Years) 29.8 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
36415 Insertion of needle into vein for collection of blood sample	68	50	$28.25	$8.65
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	61	61	$565.54	$141.46
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	58	43	$772.72	$195.53
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	37	30	$557.43	$139.57
99213 Established patient office or other outpatient visit, typically 15 minutes	30	29	$394.90	$99.51
G0008 Administration of influenza virus vaccine	14	14	$140.14	$35.30
90662 Influenza vaccine split virus, preservative free	11	11	$186.09	$81.82

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
36415 Insertion of needle into vein for collection of blood sample	82	59	$24.00	$8.40
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	73	57	$762.10	$196.07
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	63	63	$555.95	$141.83
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	35	28	$544.57	$140.80
G0008 Administration of influenza virus vaccine	22	21	$132.27	$33.84
90662 Influenza vaccine split virus, preservative free	19	19	$165.47	$71.57
99213 Established patient office or other outpatient visit, typically 15 minutes	15	15	$387.40	$99.45

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
36415 Insertion of needle into vein for collection of blood sample	71	52	$24.00	$2.96
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	53	41	$745.38	$200.48
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	43	43	$544.72	$145.67
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	41	33	$532.93	$143.11
99213 Established patient office or other outpatient visit, typically 15 minutes	17	17	$376.18	$101.42
G0009 Administration of pneumococcal vaccine	16	16	$81.75	$33.94
99443 Telephone medical discussion with physician, 21-30 minutes	13	11	$532.77	$143.06
90677 Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use	13	13	$492.31	$279.36

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	76	46	$480.66	$145.75
36415 Insertion of needle into vein for collection of blood sample	57	47	$24.00	$3.00
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	37	37	$495.08	$148.81
99213 Established patient office or other outpatient visit, typically 15 minutes	22	17	$328.64	$102.99
90662 Influenza vaccine split virus, preservative free	13	13	$104.85	$65.26
G0008 Administration of influenza virus vaccine	13	13	$100.38	$19.53

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	53	37	$449.23	$123.36
36415 Insertion of needle into vein for collection of blood sample	35	29	$24.00	$2.99
99443 Telephone medical discussion with physician, 21-30 minutes	26	20	$447.04	$123.42
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	22	22	$481.64	$132.16
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	18	11	$415.00	$114.06

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	139	43	$286.38	$79.15
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	65	34	$438.38	$121.38
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	54	20	$411.37	$113.06
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	37	33	$321.30	$85.80
99213 Established patient office or other outpatient visit, typically 15 minutes	27	27	$201.00	$55.65
99239 Hospital discharge day management, more than 30 minutes	24	24	$428.17	$117.47
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	23	23	$799.39	$220.07
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	21	21	$474.86	$130.58
36415 Insertion of needle into vein for collection of blood sample	11	11	$24.00	$2.94
G0008 Administration of influenza virus vaccine	11	11	$108.00	$18.65

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	69	40	$426.23	$118.96
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	55	28	$284.35	$78.42
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	38	25	$404.84	$112.27
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	27	26	$797.22	$218.58
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	15	15	$465.20	$129.54
99239 Hospital discharge day management, more than 30 minutes	12	12	$425.83	$117.06

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	24	20	$421.50	$116.41

Medical Specialties & State Licenses

CMS Verified: 2026-01-09

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License MA 269993

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

Massachusetts General Physicians Organization Inc

55 Fruit St, Boston, MA 021142696

Phone: 6177240287

Massachusetts General Physicians Organization Inc

50 Staniford St, Boston, MA 021142517

Practice Associates & Co-Workers

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

2 Associated Practitioners

Julie Coffey , NP

Nurse Practitioner - Adult Health

NPI 1023249190

Nurse Practitioner

Dr. Daniel Gaposchkin , MD, PhD

Internal Medicine

NPI 1821194879

Doctor of Medicine (M.D.), Doctor of Philosophy (Ph.D.)

Career & Practice History Timeline

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

9 Historical Events

📍

Updated Practice Location January 09, 2026

Registered at 70 HASTINGS ST STE 200, WELLESLEY, MA 024815439 (Tel: 7817728600)

📍

Updated Business Mailing Address January 09, 2026

Registered at 70 HASTINGS ST STE 200, WELLESLEY, MA 024815439 (Tel: 7817728600)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) January 09, 2026

Internal Medicine (License #269993 in MA)

✅

NPI Profile Active June 09, 2014

NPI status registered as active in NPPES database

📍

Updated Practice Location June 09, 2014

Registered at MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET, BOSTON, MA 02114 (Tel: 6177262865)

📍

Updated Business Mailing Address June 09, 2014

Registered at MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET, BOSTON, MA 02114 (Tel: 6177262865)

👤

Provider Name / Credentials Updated June 09, 2014

Recorded as NANCY HAFF, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) June 09, 2014

Internal Medicine (License #L-259167 in MA)

🟢

Initial NPI Registration & Enumeration June 09, 2014

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: 1922411867

Entity Type:

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

Enumeration Date: June 09, 2014

Last Update: January 09, 2026

Sole Proprietor: No

Update or Correct Profile

Mailing Address

70 Hastings St Ste 200

Wellesley, MA 024815439

Phone: 7817728600

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.