Active NPI 1114908043 Individual Practitioner Male Practitioner

Dr. William C Faquin , MD PHD

Pathology - Cytopathology • Boston, MA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. William Faquin, MD PHD is a certified Pathology - Cytopathology practicing in Boston, MA. With approximately 33 years of clinical experience since graduating from Harvard Medical School in 1993, Dr. Faquin delivers high-quality medical care to the local community at 55 FRUIT ST.

Dr. Faquin maintains professional affiliations with Massachusetts General Physicians Organization Inc, Brigham And Womens Physicians Organization Inc and accepts Medicare assignment.

Frequently performed procedures and clinical services include pathology examination of tissue using a microscope, intermediate complexity, special stained specimen slides to examine tissue, special stained specimen slides to examine tissue, initial procedure. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

55 Fruit St
Wrn 2 Pathology Associates

Boston, MA 021142621

Telephone 6175733957

Fax 6175733389

Associated Practice Facility / Clinic

🏢 Massachusetts General Hospital Facility NPI 1184613721

Medicare Profile & Education

Medical School

Harvard Medical School

Graduation Year

1993

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Pathology - Cytopathology in Boston, MA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

33 Yrs -4.2 yrs vs City Avg

City Avg: 37.2 Yrs

State Avg: 32.6 Yrs

Regional Practice Density

9 Specialists

Practicing in Boston, MA (36 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

77.5% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Faquin (33 Years) 33 Yrs

Boston Specialty Average (37.2 Years) 37.2 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
88305 Pathology examination of tissue using a microscope, intermediate complexity	516	263	$158.46	$38.24
88341 Special stained specimen slides to examine tissue	507	126	$118.34	$28.65
88342 Special stained specimen slides to examine tissue, initial procedure	189	151	$205.00	$35.70
88331 Pathology examination of specimen during surgery, first tissue block	186	69	$259.94	$63.70
88112 Cell examination of specimen, selective cellular enhancement technique	169	154	$199.00	$28.21
88307 Pathology examination of tissue using a microscope, moderately high complexity	141	77	$346.40	$84.21
88304 Pathology examination of tissue using a microscope, moderately low complexity	96	62	$64.00	$11.70
88173 Evaluation of fine needle aspirate with interpretation and report	70	63	$293.30	$71.92
88311 Preparation of tissue for examination by removing any calcium present	70	46	$51.97	$12.38
88312 Special stained specimen slides to identify organisms including interpretation and report	68	42	$111.54	$27.02
88360 Microscopic genetic analysis of tumor	50	47	$225.00	$42.53
88365 Genetic sequencing localization, initial procedure	46	41	$190.00	$43.82
88321 Surgical pathology consultation and report on referred slides prepared elsewhere	22	22	$350.82	$86.47
88108 Cell examination of specimen, concentration technique	20	20	$93.15	$23.13
88313 Special stained specimen slides to examine tissue including interpretation and report	19	17	$50.32	$12.41
88309 Pathology examination of tissue using a microscope, high complexity	18	16	$618.33	$148.63
88300 Pathology examination of tissue using a microscope, limited examination	17	16	$19.00	$4.59
88141 Pap test (Pap smear)	17	17	$132.00	$26.84
99202 New patient office or other outpatient visit, typically 20 minutes	11	11	$240.00	$49.77

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
88341 Special stained specimen slides to examine tissue	573	127	$115.39	$29.81
88305 Pathology examination of tissue using a microscope, intermediate complexity	489	222	$153.31	$39.23
88112 Cell examination of specimen, selective cellular enhancement technique	269	251	$199.00	$28.85
88342 Special stained specimen slides to examine tissue, initial procedure	211	162	$205.00	$36.68
88331 Pathology examination of specimen during surgery, first tissue block	207	77	$255.90	$65.41
88307 Pathology examination of tissue using a microscope, moderately high complexity	153	91	$339.52	$86.98
88173 Evaluation of fine needle aspirate with interpretation and report	92	82	$288.52	$73.87
88312 Special stained specimen slides to identify organisms including interpretation and report	75	48	$108.59	$27.91
88304 Pathology examination of tissue using a microscope, moderately low complexity	72	47	$60.72	$11.96
88365 Genetic sequencing localization, initial procedure	56	52	$181.21	$45.36
88311 Preparation of tissue for examination by removing any calcium present	43	35	$51.00	$13.06
88360 Microscopic genetic analysis of tumor	40	39	$225.00	$43.95
88321 Surgical pathology consultation and report on referred slides prepared elsewhere	39	39	$343.62	$88.75
88141 Pap test (Pap smear)	29	29	$132.00	$25.79
88309 Pathology examination of tissue using a microscope, high complexity	27	24	$597.59	$153.14
88108 Cell examination of specimen, concentration technique	27	26	$92.26	$23.63
88300 Pathology examination of tissue using a microscope, limited examination	22	22	$19.00	$4.67
88313 Special stained specimen slides to examine tissue including interpretation and report	21	18	$49.19	$12.65
88323 Surgical pathology consultation and report on referred material requiring preparation of slides	21	21	$356.67	$92.06
88364 Genetic sequencing localization, each additional procedure	15	12	$140.20	$35.89
88172 Evaluation of fine needle aspirate	12	11	$145.33	$37.54

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
88341 Special stained specimen slides to examine tissue	510	107	$114.21	$30.30
88305 Pathology examination of tissue using a microscope, intermediate complexity	508	207	$158.04	$40.47
88112 Cell examination of specimen, selective cellular enhancement technique	289	266	$199.00	$29.87
88342 Special stained specimen slides to examine tissue, initial procedure	179	144	$205.00	$37.41
88173 Evaluation of fine needle aspirate with interpretation and report	126	116	$294.51	$75.58
88307 Pathology examination of tissue using a microscope, moderately high complexity	119	70	$348.08	$89.27
88331 Pathology examination of specimen during surgery, first tissue block	112	39	$263.68	$67.06
88321 Surgical pathology consultation and report on referred slides prepared elsewhere	69	66	$351.93	$89.61
88360 Microscopic genetic analysis of tumor	52	44	$225.00	$44.87
88312 Special stained specimen slides to identify organisms including interpretation and report	46	26	$107.22	$28.34
88304 Pathology examination of tissue using a microscope, moderately low complexity	42	29	$60.00	$12.28
88311 Preparation of tissue for examination by removing any calcium present	41	25	$50.10	$13.44
88172 Evaluation of fine needle aspirate	41	38	$148.76	$38.20
88108 Cell examination of specimen, concentration technique	31	27	$94.03	$24.35
88323 Surgical pathology consultation and report on referred material requiring preparation of slides	29	29	$348.93	$93.50
88365 Genetic sequencing localization, initial procedure	29	27	$182.76	$47.18
88141 Pap test (Pap smear)	24	24	$132.00	$25.28
88300 Pathology examination of tissue using a microscope, limited examination	16	14	$19.00	$4.80

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
88305 Pathology examination of tissue using a microscope, intermediate complexity	512	229	$159.00	$41.07
88341 Special stained specimen slides to examine tissue	374	97	$117.69	$31.29
88331 Pathology examination of specimen during surgery, first tissue block	285	92	$264.00	$68.49
88112 Cell examination of specimen, selective cellular enhancement technique	244	220	$199.00	$30.30
88342 Special stained specimen slides to examine tissue, initial procedure	154	129	$205.00	$38.51
88307 Pathology examination of tissue using a microscope, moderately high complexity	113	67	$350.00	$91.28
88173 Evaluation of fine needle aspirate with interpretation and report	105	93	$298.00	$77.17
88312 Special stained specimen slides to identify organisms including interpretation and report	84	47	$111.05	$29.29
88360 Microscopic genetic analysis of tumor	57	55	$225.00	$46.10
88321 Surgical pathology consultation and report on referred slides prepared elsewhere	53	52	$354.00	$92.11
88311 Preparation of tissue for examination by removing any calcium present	46	27	$51.78	$13.70
88365 Genetic sequencing localization, initial procedure	44	39	$184.00	$47.91
88172 Evaluation of fine needle aspirate	41	41	$152.00	$39.40
88304 Pathology examination of tissue using a microscope, moderately low complexity	38	23	$58.26	$12.54
88108 Cell examination of specimen, concentration technique	25	25	$95.00	$24.79
88323 Surgical pathology consultation and report on referred material requiring preparation of slides	19	19	$358.37	$95.28
88364 Genetic sequencing localization, each additional procedure	19	13	$144.68	$38.09
88141 Pap test (Pap smear)	17	17	$132.00	$24.92
88309 Pathology examination of tissue using a microscope, high complexity	13	12	$617.00	$161.04
88313 Special stained specimen slides to examine tissue including interpretation and report	13	12	$51.00	$12.60
88300 Pathology examination of tissue using a microscope, limited examination	11	11	$19.00	$4.90

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
88305 Pathology examination of tissue using a microscope, intermediate complexity	482	213	$156.72	$42.42
88341 Special stained specimen slides to examine tissue	341	78	$118.11	$31.94
88112 Cell examination of specimen, selective cellular enhancement technique	286	268	$199.00	$31.01
88331 Pathology examination of specimen during surgery, first tissue block	279	92	$261.53	$70.90
88173 Evaluation of fine needle aspirate with interpretation and report	129	121	$293.40	$79.87
88342 Special stained specimen slides to examine tissue, initial procedure	126	105	$205.00	$39.70
88307 Pathology examination of tissue using a microscope, moderately high complexity	67	49	$345.07	$93.86
88312 Special stained specimen slides to identify organisms including interpretation and report	50	30	$109.36	$29.92
88172 Evaluation of fine needle aspirate	41	41	$150.49	$40.02
88360 Microscopic genetic analysis of tumor	32	31	$225.00	$47.56
88321 Surgical pathology consultation and report on referred slides prepared elsewhere	32	32	$346.19	$94.85
88311 Preparation of tissue for examination by removing any calcium present	30	23	$51.20	$13.98
88365 Genetic sequencing localization, initial procedure	30	25	$180.40	$49.36
88314 Special stained specimen slides to examine tissue and frozen preparation of specimen including interpretation and report	27	11	$92.07	$24.86
88141 Pap test (Pap smear)	23	23	$132.00	$29.84
88108 Cell examination of specimen, concentration technique	18	18	$93.56	$25.36
88323 Surgical pathology consultation and report on referred material requiring preparation of slides	15	15	$358.47	$97.77
88313 Special stained specimen slides to examine tissue including interpretation and report	13	13	$50.38	$13.56

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
88305 Pathology examination of tissue using a microscope, intermediate complexity	585	288	$156.00	$41.80
88112 Cell examination of specimen, selective cellular enhancement technique	358	325	$199.00	$30.98
88341 Special stained specimen slides to examine tissue	330	80	$117.22	$31.76
88331 Pathology examination of specimen during surgery, first tissue block	202	75	$260.00	$69.26
88342 Special stained specimen slides to examine tissue, initial procedure	131	111	$205.00	$39.36
88173 Evaluation of fine needle aspirate with interpretation and report	131	118	$292.00	$78.10
88307 Pathology examination of tissue using a microscope, moderately high complexity	116	74	$345.55	$92.37
88321 Surgical pathology consultation and report on referred slides prepared elsewhere	64	62	$344.88	$92.46
88311 Preparation of tissue for examination by removing any calcium present	48	37	$51.88	$13.77
88312 Special stained specimen slides to identify organisms including interpretation and report	47	35	$110.87	$29.35
88172 Evaluation of fine needle aspirate	46	45	$150.00	$40.25
88314 Special stained specimen slides to examine tissue and frozen preparation of specimen including interpretation and report	31	12	$91.16	$24.82
88332 Pathology examination of specimen during surgery, each additional tissue block	29	14	$129.00	$34.53
88108 Cell examination of specimen, concentration technique	22	21	$93.00	$24.86
88141 Pap test (Pap smear)	19	19	$132.84	$35.40
88313 Special stained specimen slides to examine tissue including interpretation and report	18	15	$49.11	$13.35
88365 Genetic sequencing localization, initial procedure	18	15	$181.89	$48.46
88360 Microscopic genetic analysis of tumor	18	16	$225.00	$46.95
88300 Pathology examination of tissue using a microscope, limited examination	16	15	$18.19	$4.98

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
88305 Pathology examination of tissue using a microscope, intermediate complexity	515	262	$149.91	$42.40
88341 Special stained specimen slides to examine tissue	371	77	$109.07	$31.72
88331 Pathology examination of specimen during surgery, first tissue block	322	115	$255.51	$70.99
88112 Cell examination of specimen, selective cellular enhancement technique	285	260	$199.00	$31.33
88173 Evaluation of fine needle aspirate with interpretation and report	145	127	$287.24	$79.58
88342 Special stained specimen slides to examine tissue, initial procedure	122	110	$205.00	$39.73
88307 Pathology examination of tissue using a microscope, moderately high complexity	115	74	$340.43	$93.52
88321 Surgical pathology consultation and report on referred slides prepared elsewhere	80	77	$337.24	$92.92
88312 Special stained specimen slides to identify organisms including interpretation and report	52	34	$107.08	$29.75
88311 Preparation of tissue for examination by removing any calcium present	52	37	$51.37	$14.17
88365 Genetic sequencing localization, initial procedure	37	33	$174.27	$49.24
88360 Microscopic genetic analysis of tumor	37	33	$219.70	$49.81
88172 Evaluation of fine needle aspirate	36	35	$147.17	$40.62
88108 Cell examination of specimen, concentration technique	31	30	$91.13	$25.26
88314 Special stained specimen slides to examine tissue and frozen preparation of specimen including interpretation and report	27	15	$90.26	$25.20
88313 Special stained specimen slides to examine tissue including interpretation and report	23	22	$48.13	$13.33
88141 Pap test (Pap smear)	22	21	$131.18	$36.28
88323 Surgical pathology consultation and report on referred material requiring preparation of slides	19	19	$345.00	$96.49
10021 Fine needle aspiration biopsy, first growth	16	16	$268.00	$75.84
88300 Pathology examination of tissue using a microscope, limited examination	13	13	$17.23	$4.97

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
88305 Pathology examination of tissue using a microscope, intermediate complexity	360	179	$147.32	$41.80
88112 Cell examination of specimen, selective cellular enhancement technique	298	278	$199.00	$30.32
88341 Special stained specimen slides to examine tissue	291	67	$91.55	$31.32
88173 Evaluation of fine needle aspirate with interpretation and report	139	130	$275.12	$78.09
88331 Pathology examination of specimen during surgery, first tissue block	115	37	$247.48	$69.60
88321 Surgical pathology consultation and report on referred slides prepared elsewhere	102	98	$327.18	$92.44
88342 Special stained specimen slides to examine tissue, initial procedure	88	82	$223.82	$39.16
88307 Pathology examination of tissue using a microscope, moderately high complexity	65	45	$329.60	$92.65
88312 Special stained specimen slides to identify organisms including interpretation and report	37	28	$105.00	$29.77
88108 Cell examination of specimen, concentration technique	34	34	$90.26	$24.90
88172 Evaluation of fine needle aspirate	32	32	$142.31	$39.31
88360 Microscopic genetic analysis of tumor	29	26	$211.48	$60.26
88141 Pap test (Pap smear)	27	27	$127.48	$35.66
88313 Special stained specimen slides to examine tissue including interpretation and report	23	20	$47.17	$13.12
88311 Preparation of tissue for examination by removing any calcium present	22	16	$49.23	$13.94
10021 Fine needle aspiration biopsy, first growth	18	18	$261.33	$74.16
88365 Genetic sequencing localization, initial procedure	12	11	$192.25	$48.57
99202 New patient office or other outpatient visit, typically 20 minutes	11	11	$182.09	$53.40

Medical Specialties & State Licenses

Pathology - Cytopathology Primary Specialty

NUCC Taxonomy Code: 207ZC0500X

State License MA 156029

A cytopathologist is an anatomic pathologist trained in the diagnosis of human disease by means of the study of cells obtained from body secretions and fluids, by scraping, washing, or sponging the surface of a lesion, or by the aspiration of a tumor mass or body organ with a fine needle. A major aspect of a cytopathologist's practice is the interpretation of Papanicolaou-stained smears of cells from the female reproductive systems, the "Pap" test. However, the cytopathologist's expertise is applied to the diagnosis of cells from all systems and areas of the body. He/she is a consultant to all medical specialists.

Pathology - Anatomic Pathology

NUCC Taxonomy Code: 207ZP0101X

State License MA 156029

A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

3181821 (MA)

Commercial Insurance / Payer ID Tufts Health Plan

791908 (MA)

Commercial Insurance / Payer ID Bcbs Ma

J19184 (MA)

Hospital & Practice Group Affiliations

Massachusetts General Physicians Organization Inc

55 Fruit St, Boston, MA 021142696

Phone: 6177240287

Massachusetts General Physicians Organization Inc

243 Charles St, Boston, MA 021143002

Phone: 6172735699

Brigham And Womens Physicians Organization Inc

75 Francis St, Boston, MA 021156110

Phone: 6177325500

Practice Associates & Co-Workers

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

1 Associated Practitioners

Dr. Peter Sadow , MD, PhD

Pathology - Anatomic Pathology

NPI 1154493351

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

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 55 FRUIT ST, WRN 2 PATHOLOGY ASSOCIATES, BOSTON, MA 021142621 (Tel: 6175733957)

📍

Updated Business Mailing Address July 08, 2007

Registered at PO BOX 9142, MASS GENERAL PHYSICIAN ORGANIZATION, CHARLESTOWN, MA 021299142 (Tel: 6177240287)

👤

Provider Name / Credentials Updated July 08, 2007

Recorded as WILLIAM FAQUIN, MD PHD

🎓

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

Pathology (License #156029 in MA)

🟢

Initial NPI Registration & Enumeration November 08, 2005

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: 1114908043

Entity Type:

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

Enumeration Date: November 08, 2005

Last Update: July 13, 2026

Sole Proprietor: No

Update or Correct Profile

Mailing Address

Po Box 9142, Mass General Physician Organization

Charlestown, MA 021299142

Phone: 6177240287

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.