Dr. Mark James Thorndike , MD
Surgery โข Anchorage, AK
4315 Diplomacy Dr
Anchorage, AK 995085926
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 July 8, 2006; this date does not establish years in practice.
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Published CMS data list 82 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:
- 99213 โ Established patient outpatient office visit: 45 service units.
- 45385 โ Removal of polyps or growths of large bowel using an endoscope with mechanical snare: 25 service units.
- 99203 โ New patient outpatient office visit: 12 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 the full table ยท Guide: How to read Medicare Part B data
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Published CMS data list 12 Medicare Part D prescriptions, including refills, in 2019.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2019. Published rows only; this is not a quality measure.
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Published Part D records, 2019:
- Golytely (Peg3350/Sod Sulf,bicarb,cl/Kcl) โ 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2019. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table ยท Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 75% of clinicians listed under Surgery in Anchorage, AK (2024, 29 clinicians with data). Median for this group: 148. Middle half: 82 to 235.
Fewer Medicare Part B services than 80% of clinicians listed under Surgery in Alaska (2024, 50 clinicians with data). Median for this group: 183. Middle half: 103 to 286.
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 274 in 2020 to 82 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
4315 Diplomacy Dr
Anchorage, AK 995085926
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
96 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 $13,129 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 $9,562 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.
30-day fills
12 standardized 30-day fills in 2019
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$173 in 2019
The total cost of these prescriptions in 2019, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2019.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $29.09 in 2025
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2025.
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.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
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. Thorndike 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. Thorndike 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 Anchorage and Alaska
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 75% of clinicians listed under Surgery in Anchorage, AK (2024, 29 clinicians with data). Median for this group: 148. Middle half: 82 to 235.
Fewer Medicare Part B services than 80% of clinicians listed under Surgery in Alaska (2024, 50 clinicians with data). Median for this group: 183. Middle half: 103 to 286.
Medicare-allowed amount
A lower Medicare-allowed amount than 75% of clinicians listed under Surgery in Anchorage, AK (2024, 29 clinicians with data). Median for this group: $21,360. Middle half: $13,129 to $45,092.
A lower Medicare-allowed amount than 80% of clinicians listed under Surgery in Alaska (2024, 50 clinicians with data). Median for this group: $32,430. Middle half: $18,331 to $56,442.
Paid by Medicare
A lower Medicare payment amount than 75% of clinicians listed under Surgery in Anchorage, AK (2024, 29 clinicians with data). Median for this group: $16,536. Middle half: $9,562 to $34,072.
A lower Medicare payment amount than 75% of clinicians listed under Surgery in Alaska (2024, 50 clinicians with data). Median for this group: $24,713. Middle half: $14,048 to $43,231.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Thorndike are from 2019.
48 active clinicians are listed under Surgery with a practice address in Anchorage, AK (98 in Alaska).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Anchorage
33.3% of these 48 clinicians have the CMS telehealth indicator.
64.6% of these 48 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 70% from 274 in 2020 to 82 in 2024.
- 2020: 274
- 2021: 229
- 2022: 270
- 2023: 117
- 2024: 82
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Medicare-allowed amount
Medicare-allowed amount decreased 56% from $29,713 in 2020 to $13,129 in 2024.
- 2020: $29,713
- 2021: $27,956
- 2022: $30,443
- 2023: $22,286
- 2024: $13,129
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Paid by Medicare
Paid by Medicare decreased 57% from $22,084 in 2020 to $9,562 in 2024.
- 2020: $22,084
- 2021: $21,535
- 2022: $23,312
- 2023: $16,222
- 2024: $9,562
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Medicare Part D prescriptions
Medicare Part D prescriptions went from 12 in 2013 to 12 in 2019.
- 2013: 12
- 2015: 12
- 2019: 12
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30-day fills
30-day fills went from 12 in 2013 to 12 in 2019.
- 2013: 12
- 2015: 12
- 2019: 12
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Part D drug cost
Part D drug cost went from $60 in 2013 to $173 in 2019.
- 2013: $60
- 2015: $173
- 2019: $173
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Industry payments (Open Payments)
Industry payments (Open Payments) decreased 100% from $8,641.75 in 2021 to $29.09 in 2025.
- 2021: $8,641.75
- 2023: $151.42
- 2025: $29.09
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2019), 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): fewer than 11 records totaling $29.09.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Smith+Nephew, Inc. |
Food and Beverage
In-kind items and services
|
STRAVIX | General | $29.09 |
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 2016โ2023 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, 2017โ2024; 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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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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45 | 41 | $269.00 | $85.89 |
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45385
Removal of polyps or growths of large bowel using an endoscope with mechanical snare
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25 | 25 | $2889.00 | $319.50 |
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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
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12 | 12 | $425.00 | $106.41 |
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.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2019.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Golytely | Peg3350/Sod Sulf,bicarb,cl/Kcl | 12 | 21 | $172.92 | 11 |
Source: CMS Part D by Provider and Drug, 2019; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 208600000X
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - GENERAL SURGERY
I20070709000148
TX
7618077579
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
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 Practitioner - Family
Family Nurse Practitioner
Nurse Anesthetist, Certified Registered
Certified Registered Nurse Anesthetist
Dentist
Doctor of Dental Surgery
Nurse Anesthetist, Certified Registered
Certified Registered Nurse Anesthetist
Surgery
Doctor of Medicine (M.D.)
Surgery - Vascular Surgery
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated July 08, 2006.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Surgery Specialists in Anchorage
- Dr. Ashok Rai, MD
- Dr. John Muffoletto, MD
- Dr. David Wrigley, MD
- Dr. Michael Todd, MD, FACS
- Dr. Michelle Thomas, MD, MSC, FACS
- Dr. Carolyn Majors, DO
Mailing Address
4315 Diplomacy Dr
Anchorage, AK 995085926
Phone: 9075632662