Active NPI 1801870910 Individual Practitioner Male Practitioner

Dr. Rex Neal Smith , MD PHD

Pathology - Immunopathology • Boston, MA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Rex Smith, MD PHD is a certified Pathology - Immunopathology practicing in Boston, MA. With approximately 34 years of clinical experience since graduating from Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University in 1992, Dr. Smith delivers high-quality medical care to the local community at 55 FRUIT STREET.

Dr. Smith 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 antibody evaluation, pathology examination of tissue using a microscope, intermediate complexity, special stained specimen slides to examine tissue including interpretation and report. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

55 Fruit Street
Wrn 2 Pathology Associates

Boston, MA 021142696

Telephone 6177261835

Fax 6177262365

Associated Practice Facility / Clinic

🏢 Mgh Outpatient Pharmacy Facility NPI 1902991573

Medicare Profile & Education

Medical School

Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University

Graduation Year

1992

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Pathology - Immunopathology in Boston, MA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

34 Yrs Matches City Avg

City Avg: 34.0 Yrs

State Avg: 34.0 Yrs

Regional Practice Density

2 Specialists

Practicing in Boston, MA (2 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

76.7% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Smith (34 Years) 34 Yrs

Boston Specialty Average (34.0 Years) 34.0 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
88350 Antibody evaluation, each additional single antibody stain procedure	340	38	$121.89	$29.74
88305 Pathology examination of tissue using a microscope, intermediate complexity	210	159	$160.29	$38.24
88313 Special stained specimen slides to examine tissue including interpretation and report	199	77	$50.80	$12.38
88346 Antibody evaluation, initial single antibody stain procedure	136	101	$164.00	$36.64
88312 Special stained specimen slides to identify organisms including interpretation and report	97	23	$113.18	$26.80
88307 Pathology examination of tissue using a microscope, moderately high complexity	94	61	$346.89	$84.28
88311 Preparation of tissue for examination by removing any calcium present	74	70	$51.81	$12.40
88341 Special stained specimen slides to examine tissue	70	27	$119.60	$28.69
88304 Pathology examination of tissue using a microscope, moderately low complexity	63	55	$64.00	$11.70
84181 Protein measurement	48	45	$74.67	$18.33
88342 Special stained specimen slides to examine tissue, initial procedure	35	34	$205.00	$35.83
88348 Electron microscopy for diagnosis	20	20	$321.00	$79.18
88321 Surgical pathology consultation and report on referred slides prepared elsewhere	13	13	$353.62	$86.49

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
88350 Antibody evaluation, each additional single antibody stain procedure	300	35	$117.85	$30.45
88313 Special stained specimen slides to examine tissue including interpretation and report	185	71	$49.28	$12.45
88305 Pathology examination of tissue using a microscope, intermediate complexity	153	128	$153.25	$38.82
88346 Antibody evaluation, initial single antibody stain procedure	149	120	$164.00	$37.69
88341 Special stained specimen slides to examine tissue	72	18	$115.44	$26.45
88307 Pathology examination of tissue using a microscope, moderately high complexity	66	48	$338.42	$87.00
88312 Special stained specimen slides to identify organisms including interpretation and report	57	17	$108.53	$27.51
88304 Pathology examination of tissue using a microscope, moderately low complexity	52	47	$61.23	$11.90
88311 Preparation of tissue for examination by removing any calcium present	48	43	$51.00	$13.06
84181 Protein measurement	47	44	$74.70	$18.79
88348 Electron microscopy for diagnosis	33	33	$318.64	$79.94
88342 Special stained specimen slides to examine tissue, initial procedure	31	28	$205.00	$35.88
88321 Surgical pathology consultation and report on referred slides prepared elsewhere	22	17	$343.82	$88.73

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
88350 Antibody evaluation, each additional single antibody stain procedure	227	26	$116.46	$31.40
88313 Special stained specimen slides to examine tissue including interpretation and report	135	54	$50.54	$13.04
88305 Pathology examination of tissue using a microscope, intermediate complexity	134	101	$157.57	$40.43
88346 Antibody evaluation, initial single antibody stain procedure	73	68	$164.00	$38.83
88307 Pathology examination of tissue using a microscope, moderately high complexity	67	48	$347.13	$89.28
88341 Special stained specimen slides to examine tissue	54	18	$114.13	$30.31
84181 Protein measurement	40	39	$76.65	$19.64
88311 Preparation of tissue for examination by removing any calcium present	29	26	$50.31	$13.43
88348 Electron microscopy for diagnosis	25	25	$312.12	$83.92
88342 Special stained specimen slides to examine tissue, initial procedure	20	20	$205.00	$37.39
88304 Pathology examination of tissue using a microscope, moderately low complexity	16	14	$60.00	$12.33

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
88350 Antibody evaluation, each additional single antibody stain procedure	248	28	$121.15	$31.96
88313 Special stained specimen slides to examine tissue including interpretation and report	164	53	$51.00	$13.28
88305 Pathology examination of tissue using a microscope, intermediate complexity	125	91	$159.00	$41.18
88346 Antibody evaluation, initial single antibody stain procedure	103	96	$164.00	$39.34
88307 Pathology examination of tissue using a microscope, moderately high complexity	63	43	$350.00	$90.48
88311 Preparation of tissue for examination by removing any calcium present	27	26	$51.33	$13.70
84181 Protein measurement	22	22	$77.00	$20.01
88348 Electron microscopy for diagnosis	20	20	$319.25	$85.41
88304 Pathology examination of tissue using a microscope, moderately low complexity	17	16	$57.35	$12.54
88342 Special stained specimen slides to examine tissue, initial procedure	13	11	$205.00	$38.51

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
88350 Antibody evaluation, each additional single antibody stain procedure	235	27	$118.70	$32.62
88305 Pathology examination of tissue using a microscope, intermediate complexity	142	104	$156.87	$42.51
88313 Special stained specimen slides to examine tissue including interpretation and report	133	56	$50.30	$13.60
88307 Pathology examination of tissue using a microscope, moderately high complexity	82	49	$345.46	$93.04
88341 Special stained specimen slides to examine tissue	82	19	$118.11	$31.98
88346 Antibody evaluation, initial single antibody stain procedure	81	68	$164.00	$40.38
88312 Special stained specimen slides to identify organisms including interpretation and report	80	15	$109.53	$29.96
88311 Preparation of tissue for examination by removing any calcium present	28	26	$51.46	$14.05
84181 Protein measurement	25	25	$75.08	$20.01
88348 Electron microscopy for diagnosis	24	24	$315.33	$86.18
88342 Special stained specimen slides to examine tissue, initial procedure	23	20	$205.00	$39.72
88304 Pathology examination of tissue using a microscope, moderately low complexity	17	13	$57.00	$12.89

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
88305 Pathology examination of tissue using a microscope, intermediate complexity	202	150	$156.00	$42.04
88346 Antibody evaluation, initial single antibody stain procedure	187	147	$164.00	$39.85
88313 Special stained specimen slides to examine tissue including interpretation and report	184	69	$49.16	$13.36
88307 Pathology examination of tissue using a microscope, moderately high complexity	159	68	$345.69	$91.39
88312 Special stained specimen slides to identify organisms including interpretation and report	127	24	$111.00	$29.35
88350 Antibody evaluation, each additional single antibody stain procedure	121	15	$118.00	$31.61
88341 Special stained specimen slides to examine tissue	65	23	$115.28	$31.76
88311 Preparation of tissue for examination by removing any calcium present	38	34	$51.82	$13.77
88304 Pathology examination of tissue using a microscope, moderately low complexity	34	26	$54.26	$12.61
88342 Special stained specimen slides to examine tissue, initial procedure	32	28	$205.00	$39.36
84181 Protein measurement	25	25	$73.20	$19.79
88348 Electron microscopy for diagnosis	18	18	$313.17	$84.46

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
88305 Pathology examination of tissue using a microscope, intermediate complexity	238	184	$148.67	$41.54
88313 Special stained specimen slides to examine tissue including interpretation and report	226	83	$48.12	$13.16
88346 Antibody evaluation, initial single antibody stain procedure	175	132	$164.00	$40.03
88350 Antibody evaluation, each additional single antibody stain procedure	161	19	$110.45	$31.99
88307 Pathology examination of tissue using a microscope, moderately high complexity	144	60	$339.39	$93.52
88312 Special stained specimen slides to identify organisms including interpretation and report	125	27	$105.29	$28.54
88341 Special stained specimen slides to examine tissue	85	24	$110.33	$31.72
88311 Preparation of tissue for examination by removing any calcium present	51	46	$51.08	$13.79
88304 Pathology examination of tissue using a microscope, moderately low complexity	47	40	$54.00	$13.02
88342 Special stained specimen slides to examine tissue, initial procedure	40	32	$205.00	$39.73
84181 Protein measurement	30	30	$71.00	$19.77
88348 Electron microscopy for diagnosis	22	22	$306.00	$84.78

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
88305 Pathology examination of tissue using a microscope, intermediate complexity	258	195	$147.22	$41.80
88313 Special stained specimen slides to examine tissue including interpretation and report	239	97	$47.23	$13.12
88350 Antibody evaluation, each additional single antibody stain procedure	232	29	$107.31	$31.58
88346 Antibody evaluation, initial single antibody stain procedure	158	114	$171.80	$39.82
88307 Pathology examination of tissue using a microscope, moderately high complexity	117	46	$327.67	$92.69
88341 Special stained specimen slides to examine tissue	82	20	$88.54	$31.32
88312 Special stained specimen slides to identify organisms including interpretation and report	69	15	$105.00	$29.81
88311 Preparation of tissue for examination by removing any calcium present	67	63	$48.18	$13.94
84181 Protein measurement	43	41	$70.67	$19.48
88342 Special stained specimen slides to examine tissue, initial procedure	37	26	$225.76	$39.21
88304 Pathology examination of tissue using a microscope, moderately low complexity	30	25	$54.00	$12.82
88348 Electron microscopy for diagnosis	25	25	$298.80	$83.67
88321 Surgical pathology consultation and report on referred slides prepared elsewhere	12	12	$328.00	$92.39

Medical Specialties & State Licenses

Pathology - Immunopathology Primary Specialty

NUCC Taxonomy Code: 207ZI0100X

State License MA 150072

A pathologist who specializes in the diagnosis of immunologic diseases.

Pathology - Anatomic Pathology & Clinical Pathology

NUCC Taxonomy Code: 207ZP0102X

State License MA 150072

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

3156630 (MA)

Commercial Insurance / Payer ID Bcbs Ma

J16831 (MA)

Commercial Insurance / Payer ID Tufts Health Plan

150072 (MA)

Hospital & Practice Group Affiliations

Massachusetts General Physicians Organization Inc

55 Fruit St, Boston, MA 021142696

Phone: 6177240287

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

3 Associated Practitioners

Dr. Richard Kradin , MD

Internal Medicine - Pulmonary Disease

NPI 1053301325

Doctor of Medicine (M.D.)

Dr. Atul Bhan , MBBS MD

Pathology - Anatomic Pathology

NPI 1144211285

MBBSMD

Dr. Eveline Schneeberger , MD

Pathology - Anatomic Pathology

NPI 1851381297

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 55 FRUIT STREET, WRN 2 PATHOLOGY ASSOCIATES, BOSTON, MA 021142696 (Tel: 6177261835)

📍

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 REX SMITH, MD PHD

🎓

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

Pathology (License #150072 in MA)

🟢

Initial NPI Registration & Enumeration December 01, 2005

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

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NPI Administrative Meta

NPI Number: 1801870910

Entity Type:

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

Enumeration Date: December 01, 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.