Dr. Daniel Chichek Sun , MD
Orthopaedic Surgery โข Boston, MA
800 Washington St
Boston, MA 021111552
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. Daniel Sun is listed in NPPES under Orthopaedic Surgery.
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NPI assigned on July 2, 2015; this date does not establish years in practice.
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Published CMS data list 2,463 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:
- J1010 โ Injection, methylprednisolone acetate, 1 mg: 1,601 service units.
- 99213 โ Established patient outpatient office visit: 162 service units.
- 20610 โ Aspiration and/or injection of fluid from large joint: 149 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 17 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 70 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:
- Mupirocin โ 70 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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More Medicare Part B services than 90% of clinicians listed under Orthopaedic Surgery in Boston, MA (2024, 108 clinicians with data). Median for this group: 523. Middle half: 198 to 991.
More Medicare Part B services than 70% 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 116 in 2020 to 2,463 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
800 Washington St
Boston, MA 021111552
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: Pratt Orthopaedic 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
2015
What Public CMS Data Show
Orthopaedic Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
471 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 $119,823 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 $91,364 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
70 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
$419 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: $2,897.81 across 31 records.
By nature of payment
- Travel and Lodging: $1,456.46 across 6 records.
- Food and Beverage: $1,441.35 across 25 records.
Reporting-company totals (3 largest of 6)
- Stryker Corporation: $2,542.09 across 23 records.
- Zimmer Biomet Holdings, Inc.: $181.35 across 3 records.
- Acera Surgical, Inc.: $51.90 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 2025 (published June 30, 2026).
Years since graduation
11 years (graduated 2015)
CMS Doctors and Clinicians data list 2015 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
2015
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.
May accept Medicare assignment
CMS data show this clinician may accept Medicare assignment. Clinicians who do not always accept assignment can decide case by case.
Ask the office before your visit. If a clinician does not accept assignment for a service, they can charge up to 15% more than the Medicare-approved amount, and you may be asked to pay the full amount at the visit.
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. Sun 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. Sun 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 90% of clinicians listed under Orthopaedic Surgery in Boston, MA (2024, 108 clinicians with data). Median for this group: 523. Middle half: 198 to 991.
More Medicare Part B services than 70% of clinicians listed under Orthopaedic Surgery in Massachusetts (2024, 379 clinicians with data). Median for this group: 943. Middle half: 391 to 2,997.
Medicare-allowed amount
A higher Medicare-allowed amount than 60% of clinicians listed under Orthopaedic Surgery in Boston, MA (2024, 108 clinicians with data). Median for this group: $72,139. Middle half: $21,337 to $160,217.
Close to the middle for 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.
Paid by Medicare
A higher Medicare payment amount than 60% of clinicians listed under Orthopaedic Surgery in Boston, MA (2024, 108 clinicians with data). Median for this group: $56,494. Middle half: $16,235 to $122,740.
Close to the middle for 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.
Medicare Part D prescriptions
More Part D prescriptions than 60% of clinicians listed under Orthopaedic Surgery in Boston, MA (2024, 95 clinicians with data). Median for this group: 50. Middle half: 19 to 117.
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.
Part D drug cost
A higher Part D drug cost than 60% of clinicians listed under Orthopaedic Surgery in Boston, MA (2024, 95 clinicians with data). Median for this group: $221. Middle half: $76 to $934.
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.
265 active clinicians are listed under Orthopaedic Surgery with a practice address in Boston, MA (692 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Boston
20.8% of these 265 clinicians have the CMS telehealth indicator.
54.3% of these 265 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 increased 2023% from 116 in 2020 to 2,463 in 2024.
- 2020: 116
- 2021: 223
- 2022: 270
- 2023: 380
- 2024: 2,463
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Medicare-allowed amount
Medicare-allowed amount increased 317% from $28,766 in 2020 to $119,823 in 2024.
- 2020: $28,766
- 2021: $39,226
- 2022: $49,796
- 2023: $44,205
- 2024: $119,823
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Paid by Medicare
Paid by Medicare increased 297% from $23,013 in 2020 to $91,364 in 2024.
- 2020: $23,013
- 2021: $31,380
- 2022: $37,371
- 2023: $33,650
- 2024: $91,364
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 192% from 24 in 2022 to 70 in 2024.
- 2022: 24
- 2023: 46
- 2024: 70
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30-day fills
30-day fills increased 192% from 24 in 2022 to 70 in 2024.
- 2022: 24
- 2023: 46
- 2024: 70
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Part D drug cost
Part D drug cost went from $259 in 2022 to $419 in 2024.
- 2022: $259
- 2023: $305
- 2024: $419
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Industry payments (Open Payments)
Industry payments (Open Payments) varied from year to year: $2,754.09 in 2021 and $2,897.81 in 2025.
- 2021: $2,754.09
- 2022: $557.92
- 2023: $513.58
- 2024: $958.56
- 2025: $2,897.81
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): 31 records totaling $2,897.81.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Stryker Corporation |
Travel and Lodging
Cash or cash equivalent
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MAKO | General | $429.49 |
| Stryker Corporation |
Travel and Lodging
Cash or cash equivalent
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MAKO | General | $302.07 |
| Stryker Corporation |
Travel and Lodging
Cash or cash equivalent
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MAKO | General | $220.99 |
| Stryker Corporation |
Travel and Lodging
Cash or cash equivalent
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MAKO | General | $199.99 |
| Stryker Corporation |
Travel and Lodging
Cash or cash equivalent
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MAKO | General | $198.69 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
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MAKO | General | $167.85 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
|
MAKO | General | $157.12 |
| Zimmer Biomet Holdings, Inc. |
Food and Beverage
In-kind items and services
|
G7 | General | $147.14 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
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INSIGNIA | General | $134.04 |
| Stryker Corporation |
Travel and Lodging
Cash or cash equivalent
|
MAKO | General | $105.23 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
|
MAKO | General | $102.34 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
|
MAKO | General | $78.58 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
|
MAKO | General | $73.19 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
|
MAKO | General | $61.60 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
|
MAKO | General | $53.56 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
|
MAKO | General | $48.75 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
|
MAKO | General | $44.96 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
|
MAKO | General | $42.56 |
| Aroa Biosurgery Incorporated |
Food and Beverage
Cash or cash equivalent
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โ | General | $42.11 |
| Smith+Nephew, Inc. |
Food and Beverage
In-kind items and services
|
EVOS | General | $41.57 |
| Bioventus LLC |
Food and Beverage
In-kind items and services
|
DUROLANE | General | $38.79 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
|
MAKO | General | $35.41 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
|
MAKO | General | $31.42 |
| Acera Surgical, Inc. |
Food and Beverage
In-kind items and services
|
Restrata Wound Matrix | General | $27.54 |
| Zimmer Biomet Holdings, Inc. |
Food and Beverage
In-kind items and services
|
Persona | General | $24.42 |
(top 25 shown)
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 2019โ2023 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, 2020โ2024; 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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J1010
Injection, methylprednisolone acetate, 1 mg
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1,601 | 32 | $0.60 | $0.12 |
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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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162 | 135 | $269.27 | $65.67 |
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20610
Aspiration and/or injection of fluid from large joint
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149 | 118 | $306.91 | $51.32 |
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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
|
142 | 115 | $381.07 | $95.22 |
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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
|
80 | 80 | $330.37 | $81.62 |
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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
|
55 | 43 | $269.27 | $93.43 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
|
45 | 45 | $490.37 | $132.86 |
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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
|
35 | 35 | $330.37 | $115.55 |
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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
|
34 | 28 | $381.07 | $132.66 |
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20610
Aspiration and/or injection of fluid from large joint
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31 | 23 | $290.69 | $73.44 |
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20611
Aspiration and/or injection of fluid large joint using ultrasound guidance
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29 | 26 | $362.14 | $106.35 |
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27447
Replacement of knee joint, both sides of knee
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23 | 21 | $7956.00 | $1300.58 |
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99222
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
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20 | 20 | $395.26 | $129.28 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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17 | 17 | $490.37 | $172.38 |
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20985
Computer-assisted surgery for muscle and bone procedure
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15 | 13 | $863.00 | $142.99 |
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27130
Replacement of thigh bone and hip joint with prosthesis
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14 | 14 | $7961.00 | $1270.54 |
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99221
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes
|
11 | 11 | $292.19 | $81.83 |
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 |
|---|---|---|---|---|---|
| Mupirocin | Mupirocin | 70 | 834 | $419.03 | 68 |
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: 2021-04-30NUCC 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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - ORTHOPEDIC SURGERY
I20200721002897
MA
9537583737
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 Orthopaedic Associates Inc
800 Washigton St, Boston, MA 021111552
Phone: 6176365000
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
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Anesthesiology
Doctor of Medicine (M.D.)
Internal Medicine - Nephrology
Doctor of Medicine (M.D.)
Internal Medicine - Pulmonary Disease
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 800 WASHINGTON ST, BOSTON, MA 021111552 (Tel: 6176365000)
Registered at 800 WASHINGTON STREET, TUFTS MC BOX #306, BOSTON, MA 02111 (Tel: 6176365172)
Orthopaedic Surgery (license number reported to NPPES: MA 283316)
NPI status registered as active in NPPES database
Registered at 7200 CAMBRIDGE ST, SUITE 10A, HOUSTON, TX 770304202 (Tel: 7139867390)
Registered at 7200 CAMBRIDGE ST, SUITE 10A, HOUSTON, TX 770304202 (Tel: 7139867390)
Recorded as DANIEL SUN, M.D.
Orthopaedic Surgery (license number reported to NPPES: TX BP10053399)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Orthopaedic Surgery Specialists in Boston
- Dr. Vito Pugliano, MD
- Dr. John Guido Esposito, MD
- Dr. Abhiram Bhashyam, MD, PhD
- Dr. James Herndon, MD MBA
- Dr. Hardy Evans, MD
- Dr. Megan Audet, MD
More public profiles in Massachusetts
Directory navigation, in NPI number order.
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Mailing Address
800 Washington Street, Tufts Mc Box #306
Boston, MA 02111
Phone: 6176365172