Dr. Andrew Scott Karson , MD
Internal Medicine • Worcester, MA
55 Lake Ave N
Worcester, MA 016550002
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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Dr. Andrew Karson is listed in NPPES under Internal Medicine.
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NPI assigned on November 8, 2005; this date does not establish years in practice.
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Published CMS data list 116 Original Medicare Part B services in 2023.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2023. Published rows only; this is not a quality measure.
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Published Part B service records, 2023:
- 99232 — Subsequent hospital care with moderate levelof medical decision making: 61 service units.
- 99233 — Subsequent hospital care with moderate levelof medical decision making: 32 service units.
- 99231 — Subsequent hospital care with straightforward or low level of medical decision making, per day: 23 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2023. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2022 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2023). CPT notice
See the full table · Guide: How to read Medicare Part B data
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Medicare Part B services went from 190 in 2017 to 116 in 2023.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017–2023.
Practice Location & Contact Primary Location
55 Lake Ave N
Worcester, MA 016550002
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Umass Memorial Medical Group 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
Harvard Medical School
1995
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $9,934 in 2023
The total amount Medicare approved for these services in 2023. 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 – by Provider and Service, 2023.
Paid by Medicare
About $7,938 in 2023
The part of the Medicare-allowed amount that Medicare itself paid in 2023, 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 – by Provider and Service, 2023.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019–2025.
Years since graduation
31 years (graduated 1995)
CMS Doctors and Clinicians data list 1995 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
2005
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, “Does your provider accept Medicare as full payment?”
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. Karson 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. Karson 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 Worcester and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Karson are from 2023.
448 active clinicians are listed under Internal Medicine with a practice address in Worcester, MA (6,830 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Worcester
16.3% of these 448 clinicians have the CMS telehealth indicator.
57.6% of these 448 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 decreased 39% from 190 in 2017 to 116 in 2023.
- 2017: 190
- 2021: 145
- 2022: 77
- 2023: 116
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Medicare-allowed amount
Medicare-allowed amount decreased 47% from $18,903 in 2017 to $9,934 in 2023.
- 2017: $18,903
- 2021: $12,235
- 2022: $6,627
- 2023: $9,934
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Paid by Medicare
Paid by Medicare decreased 47% from $14,863 in 2017 to $7,938 in 2023.
- 2017: $14,863
- 2021: $9,558
- 2022: $5,186
- 2023: $7,938
Sources: CMS Medicare Physician & Other Practitioners (2023), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2022 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 – by Provider and Service data, 2017–2023; 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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99232
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
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61 | 28 | $238.00 | $80.46 |
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99233
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes
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32 | 16 | $342.00 | $120.95 |
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99231
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes
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23 | 11 | $158.00 | $50.25 |
Source: CMS Part B by Provider and Service, 2023; 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
Self-certified to NPPES: 2020-10-28NUCC Taxonomy Code: 207R00000X
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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20101111001403
MA
7911192299
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
Umass Memorial Medical Group Inc
55 Lake Ave N, Worcester, MA 016550002
Phone: 5083341000
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Anesthetist, Certified Registered
Certified Registered Nurse Anesthetist
Radiology - Diagnostic Radiology
Dermatology
Medical Genetics - Clinical Genetics (M.D.)
Doctor of Medicine (M.D.)
Nurse Practitioner
Nurse Practitioner
Internal Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 55 LAKE AVE N, WORCESTER, MA 016550002 (Tel: 7744423797)
Registered at PO BOX 415348, BOSTON, MA 022415348 (Tel: 8002258885)
NPI status registered as active in NPPES database
Registered at 55 FRUIT ST, FND 7, BOSTON, MA 021142696 (Tel: 6177248262)
Registered at PO BOX 9142, CHARLESTOWN, MA 021299142 (Tel: 6177240287)
Recorded as ANDREW KARSON, MD
Internal Medicine (license number reported to NPPES: MA 155144)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Worcester
- Dr. Elena Byhoff, MD
- Dr. Ish Gupta, DO
- Dr. Jakub Pach, MD
- Dr. Paul Dufault, MD
- Dr. Christine Hebert, MD
- Dr. Benyamin Yaniv, MD
Mailing Address
Po Box 415348
Boston, MA 022415348
Phone: 8002258885