Dr. Christopher Wesley Baker , MD
Orthopaedic Surgery โข Concord, MA
54 Baker Avenue Ext Ste 200
Concord, MA 017422137
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. Christopher Baker is listed in NPPES under Orthopaedic Surgery.
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NPI assigned on January 10, 2007; this date does not establish years in practice.
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Published CMS data list 606 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: 250 service units.
- 73630 โ X-ray of foot, minimum of 3 views: 111 service units.
- 73610 โ X-ray of ankle, minimum of 3 views: 98 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 6 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 75 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Diclofenac Sodium โ 40 prescription fills, including refills.
- Oxycodone Hcl โ 22 prescription fills, including refills.
- Naproxen โ 13 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. 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 60% of clinicians listed under Orthopaedic Surgery in Massachusetts (2024, 379 clinicians with data). Median for this group: 943. Middle half: 391 to 2,997.
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 855 in 2020 to 606 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
54 Baker Avenue Ext Ste 200
Concord, MA 017422137
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: Orthopedic Affiliates 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
Boston University School Of Medicine
2003
What Public CMS Data Show
Orthopaedic Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
249 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 $50,392 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 $34,367 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
79 standardized 30-day fills in 2024
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
$662 in 2024
The total cost of these prescriptions in 2024, 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, 2024.
Open Payments general payments, program year 2025
All general payments: $101.89 across 3 records.
By nature of payment
- Food and Beverage: $101.89 across 3 records.
Reporting-company totals
- Stryker Corporation: $78.50 across 2 records.
- LIGHTFORCE ORTHODONTICS, INC.: $23.39 across 1 record.
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
23 years (graduated 2003)
CMS Doctors and Clinicians data list 2003 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
2007
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. Baker 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. Baker 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 Concord and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 60% of clinicians listed under Orthopaedic Surgery in Massachusetts (2024, 379 clinicians with data). Median for this group: 943. Middle half: 391 to 2,997.
Too few clinicians listed under Orthopaedic Surgery in Concord have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A lower Medicare-allowed amount than 65% of clinicians listed under Orthopaedic Surgery in Massachusetts (2024, 379 clinicians with data). Median for this group: $106,534. Middle half: $39,615 to $188,576.
Too few clinicians listed under Orthopaedic Surgery in Concord have Medicare Part B data for 2024 to compare.
Paid by Medicare
A lower Medicare payment amount than 70% of clinicians listed under Orthopaedic Surgery in Massachusetts (2024, 379 clinicians with data). Median for this group: $78,919. Middle half: $29,480 to $142,985.
Too few clinicians listed under Orthopaedic Surgery in Concord have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Orthopaedic Surgery in Massachusetts (2024, 319 clinicians with data). Median for this group: 81. Middle half: 36 to 226.
Too few clinicians listed under Orthopaedic Surgery in Concord have Medicare Part D data for 2024 to compare.
Part D drug cost
Close to the middle for clinicians listed under Orthopaedic Surgery in Massachusetts (2024, 319 clinicians with data). Median for this group: $460. Middle half: $145 to $1,460.
Too few clinicians listed under Orthopaedic Surgery in Concord have Medicare Part D data for 2024 to compare.
8 active clinicians are listed under Orthopaedic Surgery with a practice address in Concord, MA (692 in Massachusetts).
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 decreased 29% from 855 in 2020 to 606 in 2024.
- 2020: 855
- 2021: 943
- 2022: 773
- 2023: 730
- 2024: 606
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Medicare-allowed amount
Medicare-allowed amount decreased 23% from $65,042 in 2020 to $50,392 in 2024.
- 2020: $65,042
- 2021: $76,658
- 2022: $58,261
- 2023: $57,844
- 2024: $50,392
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Paid by Medicare
Paid by Medicare decreased 28% from $47,405 in 2020 to $34,367 in 2024.
- 2020: $47,405
- 2021: $57,804
- 2022: $43,456
- 2023: $42,358
- 2024: $34,367
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 69% from 239 in 2020 to 75 in 2024.
- 2020: 239
- 2021: 136
- 2022: 140
- 2023: 165
- 2024: 75
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30-day fills
30-day fills decreased 70% from 263 in 2020 to 79 in 2024.
- 2020: 263
- 2021: 137
- 2022: 141
- 2023: 168
- 2024: 79
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Part D drug cost
Part D drug cost decreased 78% from $3,010 in 2020 to $662 in 2024.
- 2020: $3,010
- 2021: $1,448
- 2022: $1,594
- 2023: $1,653
- 2024: $662
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $120.77 in 2019 to $101.89 in 2025.
- 2019: $120.77
- 2020: $2,184.01
- 2021: $248.72
- 2023: $206.40
- 2025: $101.89
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (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): fewer than 11 records totaling $101.89.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Stryker Corporation |
Food and Beverage
In-kind items and services
|
T2 | General | $56.97 |
| LIGHTFORCE ORTHODONTICS, INC. |
Food and Beverage
In-kind items and services
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LIGHTFORCE ORTHODONTIC SYSTEM | General | $23.39 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
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PANGEA | General | $21.53 |
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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250 | 160 | $275.12 | $96.83 |
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73630
X-ray of foot, minimum of 3 views
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111 | 85 | $126.09 | $42.19 |
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73610
X-ray of ankle, minimum of 3 views
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98 | 73 | $122.29 | $40.02 |
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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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86 | 86 | $468.60 | $117.61 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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48 | 41 | $438.54 | $135.79 |
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20610
Aspiration and/or injection of fluid from large joint
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13 | 12 | $272.31 | $72.83 |
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 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Diclofenac Sodium | Diclofenac Sodium | 40 | 964 | $514.89 | 25 |
| Oxycodone Hcl | Oxycodone Hcl | 22 | 142 | $90.92 | 13 |
| Naproxen | Naproxen | 13 | 405 | $56.27 | 12 |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2025-04-24NUCC Taxonomy Code: 207X00000X
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - ORTHOPEDIC SURGERY
I20110914000445
MA
5294906756
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
Orthopedic Affiliates Inc
54 Baker Ave Ext, Concord, MA 017422137
Phone: 9783695391
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Orthopaedic Surgery - Pediatric Orthopaedic Surgery
Doctor of Medicine (M.D.), Doctor of Philosophy (Ph.D.)
Physician Assistant
Physician Assistant (Certified)
Physician Assistant
Physician Assistant (Certified)
Orthopaedic Surgery
Doctor of Medicine (M.D.)
Physician Assistant - Surgical
Physician Assistant
Physician Assistant (Certified)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 54 BAKER AVENUE EXT STE 200, CONCORD, MA 017422137 (Tel: 9783695391)
NPI status registered as active in NPPES database
Registered at 14 RESEARCH PL, NORTH CHELMSFORD, MA 018632412 (Tel: 9784540706)
Registered at 14 RESEARCH PL, NORTH CHELMSFORD, MA 018632412 (Tel: 9784540706)
Recorded as CHRISTOPHER BAKER, M.D.
Orthopaedic Surgery (license number reported to NPPES: MA 234923)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Orthopaedic Surgery Specialists in Concord
- Matthew Sloan
- Dr. Paul Re, MD
- Dr. Christopher Worgul, MD
- Dr. Dean Howard, MD
- Dr. John Mcinnis, MD
- Dr. Donald Driscoll, MD
Mailing Address
14 Research Pl
North Chelmsford, MA 018632412
Phone: 9784540706