Dr. John Michael Fox , MD
Anesthesiology โข Boston, MA
800 Washington St
Boston, MA 02111
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on June 15, 2012; this date does not establish years in practice.
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Published CMS data list 210 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99291 โ Critical care: 145 service units.
- 00560 โ Anesthesia for procedure on heart and large blood vessels: 23 service units.
- 36620 โ Insertion of artery tube for blood sampling or infusion through skin: 14 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 5 records in the table ยท Guide: How to read Medicare Part B data
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More Medicare Part B services than 70% of clinicians listed under Anesthesiology in Boston, MA (2024, 528 clinicians with data). Median for this group: 118. Middle half: 53 to 224.
More Medicare Part B services than 65% of clinicians listed under Anesthesiology in Massachusetts (2024, 1,137 clinicians with data). Median for this group: 136. Middle half: 66 to 248.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 207 in 2020 to 210 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
800 Washington St
Boston, MA 02111
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Charleston, SC. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Pratt Anesthesiology Associates Inc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
University Of Louisville School Of Medicine
2012
What Public CMS Data Show
Anesthesiology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
108 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $44,869 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $35,575 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Open Payments general payments, program year 2025
All general payments: $1,271.94 across 24 records.
By nature of payment
- Food and Beverage: $1,271.94 across 24 records.
Reporting-company totals (3 largest of 13)
- AOP Health US, LLC: $515.87 across 1 record.
- Abbott Laboratories: $201.52 across 3 records.
- ABIOMED: $120.98 across 3 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
14 years (graduated 2012)
CMS Doctors and Clinicians data list 2012 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2012
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Fox has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Fox as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Boston and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 70% of clinicians listed under Anesthesiology in Boston, MA (2024, 528 clinicians with data). Median for this group: 118. Middle half: 53 to 224.
More Medicare Part B services than 65% of clinicians listed under Anesthesiology in Massachusetts (2024, 1,137 clinicians with data). Median for this group: 136. Middle half: 66 to 248.
Medicare-allowed amount
A higher Medicare-allowed amount than 80% of clinicians listed under Anesthesiology in Boston, MA (2024, 528 clinicians with data). Median for this group: $15,862. Middle half: $7,477 to $33,650.
A higher Medicare-allowed amount than 85% of clinicians listed under Anesthesiology in Massachusetts (2024, 1,137 clinicians with data). Median for this group: $16,429. Middle half: $8,286 to $31,402.
Paid by Medicare
A higher Medicare payment amount than 80% of clinicians listed under Anesthesiology in Boston, MA (2024, 528 clinicians with data). Median for this group: $12,488. Middle half: $5,940 to $26,601.
A higher Medicare payment amount than 85% of clinicians listed under Anesthesiology in Massachusetts (2024, 1,137 clinicians with data). Median for this group: $13,131. Middle half: $6,643 to $24,992.
1,083 active clinicians are listed under Anesthesiology with a practice address in Boston, MA (2,090 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Boston
1.8% of these 1,083 clinicians have the CMS telehealth indicator.
69.2% of these 1,083 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services varied from year to year: 207 in 2020 and 210 in 2024.
- 2020: 207
- 2021: 180
- 2022: 207
- 2023: 128
- 2024: 210
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Medicare-allowed amount
Medicare-allowed amount decreased 14% from $52,034 in 2020 to $44,869 in 2024.
- 2020: $52,034
- 2021: $47,132
- 2022: $41,016
- 2023: $26,288
- 2024: $44,869
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Paid by Medicare
Paid by Medicare decreased 14% from $41,589 in 2020 to $35,575 in 2024.
- 2020: $41,589
- 2021: $37,630
- 2022: $32,721
- 2023: $20,696
- 2024: $35,575
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $53.37 in 2023 to $1,271.94 in 2025.
- 2023: $53.37
- 2024: $188.20
- 2025: $1,271.94
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 โ December 31, 2025): 24 records totaling $1,271.94.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| AOP Health US, LLC |
Food and Beverage
In-kind items and services
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Rapiblyk | General | $515.87 |
| Abbott Laboratories |
Food and Beverage
In-kind items and services
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AMPLATZER | General | $87.52 |
| Abbott Laboratories |
Food and Beverage
In-kind items and services
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AMPLATZER | General | $72.00 |
| ABIOMED |
Food and Beverage
In-kind items and services
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โ | General | $45.15 |
| ABIOMED |
Food and Beverage
In-kind items and services
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โ | General | $42.50 |
| Abbott Laboratories |
Food and Beverage
In-kind items and services
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AMPLATZER | General | $42.00 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
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OPSUMIT | General | $39.45 |
| HEARTFLOW, INC. |
Food and Beverage
Cash or cash equivalent
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FFRct | General | $35.20 |
| ABIOMED |
Food and Beverage
In-kind items and services
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โ | General | $33.33 |
| Bristol Myers Squibb Company |
Food and Beverage
Cash or cash equivalent
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CAMZYOS | General | $33.14 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
ELIQUIS | General | $30.32 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
ELIQUIS | General | $30.32 |
| HEARTFLOW, INC. |
Food and Beverage
Cash or cash equivalent
|
FFRct | General | $29.36 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
ELIQUIS | General | $29.27 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
ELIQUIS | General | $25.72 |
| CARDIVA MEDICAL, INC. |
Food and Beverage
In-kind items and services
|
OPTOWIRE | General | $25.16 |
| Alnylam Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
|
ONPATTRO | General | $24.46 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
OPSUMIT | General | $22.38 |
| Bayer Healthcare Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
|
Adempas | General | $20.67 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
REPATHA | General | $19.85 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
REPATHA | General | $19.84 |
| Alnylam Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
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ONPATTRO | General | $17.43 |
| SCPHARMACEUTICALS INC. |
Food and Beverage
In-kind items and services
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FUROSCIX | General | $15.60 |
| BridgeBio Pharma, Inc. |
Food and Beverage
In-kind items and services
|
Attruby | General | $15.40 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2017โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2018โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99291
Critical care, first 30-74 minutes
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145 | 33 | $1279.00 | $218.47 |
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00560
Anesthesia for procedure on heart and large blood vessels
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23 | 23 | $3751.00 | $471.36 |
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36620
Insertion of artery tube for blood sampling or infusion through skin
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14 | 14 | $127.67 | $44.74 |
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76937
Ultrasonic guidance for blood vessel access
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14 | 14 | $118.04 | $14.17 |
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93312
Ultrasound of heart with probe in esophagus, with report
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14 | 14 | $821.59 | $108.95 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207L00000X
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
NUCC Taxonomy Code: 207L00000X
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
NUCC Taxonomy Code: 207LC0200X
An anesthesiologist, who specializes in critical care medicine diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - ANESTHESIOLOGY
I20180626002629
MA
2668761644
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Pratt Anesthesiology Associates Inc
800 Washigton St, Boston, MA 021111552
Phone: 6176366044
Secondary Practice Locations
171 Ashley Ave
Charleston, SC 294258908
Phone: 8437921414
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Surgery
Doctor of Medicine (M.D.), Master of Public Health
Psychiatry & Neurology - Psychiatry
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Obstetrics & Gynecology
Doctor of Medicine (M.D.)
Internal Medicine - Cardiovascular Disease
Bachelor of Medicine, Bachelor of Surgery (M.B.B.S.)
Psychiatry & Neurology - Clinical Neurophysiology
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Anesthesiology (license number reported to NPPES: SC MD34894)
Registered at 800 WASHINGTON ST, BOSTON, MA 02111 (Tel: (617) 636-9339)
Anesthesiology (license number reported to NPPES: MA 269628)
NPI status registered as active in NPPES database
Registered at 800 WASHINGTON ST, BOSTON, MA 021111552 (Tel: (617) 636-9339)
Registered at 800 WASHINGTON ST, BOSTON, MA 021111552 (Tel: (617) 636-9339)
Recorded as JOHN FOX, M.D.
Anesthesiology (license number reported to NPPES: MA 269628)
NPI status registered as active in NPPES database
Registered at 171 ASHLEY AVE, CHARLESTON, SC 294258908 (Tel: 8437921414)
Registered at PO BOX 751461, CHARLOTTE, NC 282751461 (Tel: 8437926200)
Recorded as JOHN FOX, M.D.
Anesthesiology (license number reported to NPPES: SC LL34894)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Anesthesiology Specialists in Boston
- Dr. Cory Faragon, MD
- Agnieszka Trzcinka,
- Dr. Kyung Oh, DO, MS
- Dr. Sadek Al Assadi, MD
- Dr. Jennifer Chatburn, MD
- Dr. Emily Guimaraes, MD
Mailing Address
800 Washington St
Boston, MA 021111552
Phone: 6176369339