Dr. Kathryn E Stack , MD
Anesthesiology • Old Lyme, CT
15 Wood Crest Dr
Old Lyme, CT 063712840
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 13, 2006; this date does not establish years in practice.
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Published CMS data list 209 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 00731 — Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope: 43 service units.
- 00142 — Anesthesia for lens surgery: 37 service units.
- 00813 — Anesthesia for procedure on small and large bowel using an endoscope: 35 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® 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 8 records in the table · Guide: How to read Medicare Part B data
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More Medicare Part B services than 75% of clinicians listed under Anesthesiology in Connecticut (2024, 474 clinicians with data). Median for this group: 101. Middle half: 50 to 197.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 185 in 2020 to 209 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
15 Wood Crest Dr
Old Lyme, CT 063712840
CMS Doctors and Clinicians lists 1 group name: Northeast 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
New York Medical College
1992
What Public CMS Data Show
Anesthesiology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
282 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 – by Provider, 2024.
Medicare-allowed amount
About $21,193 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 – by Provider and Service, 2024.
Paid by Medicare
About $17,133 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 – by Provider and Service, 2024.
Open Payments general payments, program year 2022
All general payments: $41.84 across 2 records.
By nature of payment
- Food and Beverage: $41.84 across 2 records.
Reporting-company totals
- Merck Sharp & Dohme LLC: $41.84 across 2 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 2022 (published June 30, 2026).
Years since graduation
34 years (graduated 1992)
CMS Doctors and Clinicians data list 1992 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
2006
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. Stack 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. Stack 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 Old Lyme and Connecticut
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 75% of clinicians listed under Anesthesiology in Connecticut (2024, 474 clinicians with data). Median for this group: 101. Middle half: 50 to 197.
Too few clinicians listed under Anesthesiology in Old Lyme have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 75% of clinicians listed under Anesthesiology in Connecticut (2024, 474 clinicians with data). Median for this group: $11,819. Middle half: $5,258 to $20,743.
Too few clinicians listed under Anesthesiology in Old Lyme have Medicare Part B data for 2024 to compare.
Paid by Medicare
A higher Medicare payment amount than 75% of clinicians listed under Anesthesiology in Connecticut (2024, 474 clinicians with data). Median for this group: $9,453. Middle half: $4,178 to $16,634.
Too few clinicians listed under Anesthesiology in Old Lyme have Medicare Part B data for 2024 to compare.
1 active clinicians are listed under Anesthesiology with a practice address in Old Lyme, CT (798 in Connecticut).
Addresses are self-reported to NPPES and may be out of date.
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 increased 13% from 185 in 2020 to 209 in 2024.
- 2020: 185
- 2021: 129
- 2022: 217
- 2023: 210
- 2024: 209
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Medicare-allowed amount
Medicare-allowed amount varied from year to year: $20,582 in 2020 and $21,193 in 2024.
- 2020: $20,582
- 2021: $12,309
- 2022: $20,452
- 2023: $20,206
- 2024: $21,193
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Paid by Medicare
Paid by Medicare varied from year to year: $16,458 in 2020 and $17,133 in 2024.
- 2020: $16,458
- 2021: $9,859
- 2022: $16,798
- 2023: $16,283
- 2024: $17,133
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $38.43 in 2019 to $41.84 in 2022.
- 2019: $38.43
- 2020: $18.57
- 2021: $24.19
- 2022: $41.84
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Open Payments (2022), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · 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 2022 (payments made January 1 – December 31, 2022): fewer than 11 records totaling $41.84.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Merck Sharp & Dohme LLC |
Food and Beverage
In-kind items and services
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BRIDION | General | $20.93 |
| Merck Sharp & Dohme LLC |
Food and Beverage
In-kind items and services
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BRIDION | General | $20.91 |
Source: CMS Open Payments, program year 2022, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 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, 2017–2024; 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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00731
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope
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43 | 42 | $1405.14 | $93.27 |
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00142
Anesthesia for lens surgery
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37 | 35 | $1190.50 | $60.39 |
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00813
Anesthesia for procedure on small and large bowel using an endoscope
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35 | 35 | $1559.29 | $112.82 |
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00811
Anesthesia for other procedure on large bowel using an endoscope
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32 | 32 | $1326.22 | $97.87 |
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00910
Anesthesia for other procedure on urinary system through urethra
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18 | 17 | $1288.83 | $77.98 |
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00790
Anesthesia for other procedure on upper abdomen
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16 | 16 | $2902.19 | $186.06 |
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00812
Anesthesia for exam of colon using an endoscope
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14 | 14 | $1184.00 | $69.73 |
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00840
Anesthesia for other procedure on lower abdomen
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14 | 14 | $2638.89 | $179.30 |
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
Self-certified to NPPES: 2021-12-23NUCC 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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - ANESTHESIOLOGY
I20190912000966
RI
4587727292
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
Northeast Medical Group Inc
25 Wells St, Westerly, RI 028912922
Phone: 4015966000
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 15 WOOD CREST DR, OLD LYME, CT 063712840 (Tel: 4049329109)
Registered at 15 WOOD CREST DR, OLD LYME, CT 063712840 (Tel: 4049329109)
Anesthesiology (license number reported to NPPES: CT 57186)
NPI status registered as active in NPPES database
Registered at EMORY UNIVERSITY SCHOOL OF MEDICINE GRADY MEMORIAL, 49 JESSE HILL JR. DR, ATLANTA, GA 303220001 (Tel: 4046166742)
Registered at 6200 MOUNTAIN BROOK LN NW, ATLANTA, GA 303283605 (Tel: 4046161296)
Recorded as KATHRYN STACK, MD
Anesthesiology (license number reported to NPPES: GA 038621)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Mailing Address
15 Wood Crest Dr
Old Lyme, CT 063712840
Phone: 4049329109