Dr. Tung Phan , MD
Internal Medicine โข 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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NPI assigned on April 2, 2018; this date does not establish years in practice.
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Published CMS data list 155 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: 61 service units.
- 99214 โ Established patient outpatient office visit: 38 service units.
- 99214 โ Established patient outpatient office visit: 30 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 5 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 817 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:
- Quetiapine Fumarate โ 84 prescription fills, including refills.
- Trazodone Hcl โ 82 prescription fills, including refills.
- Fluoxetine Hcl โ 45 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 all 34 records in the table ยท Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 80% of clinicians listed under Internal Medicine in Worcester, MA (2024, 242 clinicians with data). Median for this group: 468. Middle half: 232 to 684.
Fewer Medicare Part B services than 75% of clinicians listed under Internal Medicine in Massachusetts (2024, 3,773 clinicians with data). Median for this group: 526. Middle half: 199 to 1,077.
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 43 in 2023 to 155 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023โ2024.
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, CMS release of October 2, 2026.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
Tufts University School Of Medicine
2018
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
115 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 $14,354 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 $9,396 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
1,053 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
$17,569 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.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019โ2025.
Years since graduation
8 years (graduated 2018)
CMS Doctors and Clinicians data list 2018 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, CMS release of October 2, 2026.
NPI first issued
2018
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, CMS release of October 2, 2026; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians, CMS release of October 2, 2026.
Enrolled in Medicare (PECOS)
Dr. Phan 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. Phan 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 services
Fewer Medicare Part B services than 80% of clinicians listed under Internal Medicine in Worcester, MA (2024, 242 clinicians with data). Median for this group: 468. Middle half: 232 to 684.
Fewer Medicare Part B services than 75% of clinicians listed under Internal Medicine in Massachusetts (2024, 3,773 clinicians with data). Median for this group: 526. Middle half: 199 to 1,077.
Medicare-allowed amount
A lower Medicare-allowed amount than 85% of clinicians listed under Internal Medicine in Worcester, MA (2024, 242 clinicians with data). Median for this group: $47,115. Middle half: $22,706 to $72,133.
A lower Medicare-allowed amount than 80% of clinicians listed under Internal Medicine in Massachusetts (2024, 3,773 clinicians with data). Median for this group: $50,301. Middle half: $19,690 to $96,604.
Paid by Medicare
A lower Medicare payment amount than 85% of clinicians listed under Internal Medicine in Worcester, MA (2024, 242 clinicians with data). Median for this group: $36,487. Middle half: $16,653 to $55,732.
A lower Medicare payment amount than 80% of clinicians listed under Internal Medicine in Massachusetts (2024, 3,773 clinicians with data). Median for this group: $38,367. Middle half: $14,848 to $75,032.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Internal Medicine in Worcester, MA (2024, 203 clinicians with data). Median for this group: 331. Middle half: 64 to 3,308.
Close to the middle for clinicians listed under Internal Medicine in Massachusetts (2024, 3,673 clinicians with data). Median for this group: 1,163. Middle half: 127 to 3,739.
Part D drug cost
Close to the middle for clinicians listed under Internal Medicine in Worcester, MA (2024, 203 clinicians with data). Median for this group: $37,364. Middle half: $1,656 to $228,116.
A lower Part D drug cost than 65% of clinicians listed under Internal Medicine in Massachusetts (2024, 3,673 clinicians with data). Median for this group: $101,447. Middle half: $8,909 to $319,514.
443 active clinicians are listed under Internal Medicine with a practice address in Worcester, MA (6,822 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Worcester
18.5% of these 443 clinicians have the CMS telehealth indicator.
59.1% of these 443 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 260% from 43 in 2023 to 155 in 2024.
- 2023: 43
- 2024: 155
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Medicare-allowed amount
Medicare-allowed amount increased 379% from $2,997 in 2023 to $14,354 in 2024.
- 2023: $2,997
- 2024: $14,354
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Paid by Medicare
Paid by Medicare increased 307% from $2,307 in 2023 to $9,396 in 2024.
- 2023: $2,307
- 2024: $9,396
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Medicare Part D prescriptions
Medicare Part D prescriptions went from 11 in 2021 to 817 in 2024.
- 2021: 11
- 2022: 115
- 2023: 47
- 2024: 817
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30-day fills
30-day fills went from 19 in 2021 to 1,053 in 2024.
- 2021: 19
- 2022: 211
- 2023: 93
- 2024: 1,053
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Part D drug cost
Part D drug cost went from $237 in 2021 to $17,569 in 2024.
- 2021: $237
- 2022: $2,208
- 2023: $13,916
- 2024: $17,569
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2022โ2023 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, 2023โ2024; 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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61 | 53 | $300.00 | $65.12 |
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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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38 | 29 | $445.00 | $78.19 |
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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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30 | 11 | $174.33 | $127.69 |
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99215
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
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14 | 13 | $647.57 | $89.69 |
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90792
Psychiatric diagnostic evaluation with medical services
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12 | 12 | $452.03 | $193.66 |
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 |
|---|---|---|---|---|---|
| Quetiapine Fumarate | Quetiapine Fumarate | 84 | 2,632 | $559.67 | โ |
| Trazodone Hcl | Trazodone Hcl | 82 | 3,694 | $387.37 | 18 |
| Fluoxetine Hcl | Fluoxetine Hcl | 45 | 1,560 | $276.53 | โ |
| Mirtazapine | Mirtazapine | 43 | 1,288 | $173.25 | โ |
| Bupropion Xl | Bupropion Hcl | 41 | 1,410 | $363.91 | โ |
| Sertraline Hcl | Sertraline Hcl | 40 | 1,554 | $266.12 | โ |
| Olanzapine | Olanzapine | 40 | 1,178 | $513.37 | โ |
| Duloxetine Hcl | Duloxetine Hcl | 29 | 1,030 | $720.73 | โ |
| Gabapentin | Gabapentin | 24 | 810 | $371.70 | โ |
| Atorvastatin Calcium | Atorvastatin Calcium | 24 | 1,620 | $263.53 | โ |
| Escitalopram Oxalate | Escitalopram Oxalate | 24 | 722 | $93.76 | โ |
| Paroxetine Hcl | Paroxetine Hcl | 23 | 690 | $66.85 | โ |
| Citalopram Hbr | Citalopram Hydrobromide | 20 | 650 | $53.02 | โ |
| Ventolin Hfa | Albuterol Sulfate | 20 | 395 | $1,161.00 | โ |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 20 | 1,260 | $255.63 | โ |
| Lorazepam | Lorazepam | 19 | 570 | $431.09 | โ |
| Risperidone | Risperidone | 19 | 850 | $102.54 | โ |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 18 | 507 | $599.33 | โ |
| Donepezil Hcl | Donepezil Hcl | 17 | 494 | $37.16 | โ |
| Lamotrigine | Lamotrigine | 16 | 660 | $277.00 | โ |
| Levothyroxine Sodium | Levothyroxine Sodium | 15 | 1,252 | $97.96 | โ |
| Lisinopril | Lisinopril | 13 | 1,050 | $54.46 | โ |
| Clonidine Hcl | Clonidine Hcl | 13 | 390 | $33.02 | โ |
| Losartan Potassium | Losartan Potassium | 13 | 843 | $105.59 | โ |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 13 | 210 | $94.77 | โ |
(top 25 shown)
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: 2023-07-18NUCC 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.
NUCC Taxonomy Code: 2084P0800X
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20230802000416
MA
5395106702
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, CMS release of October 2, 2026
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.
Internal Medicine
Internal Medicine
Doctor of Osteopathic Medicine (D.O.)
Nurse Practitioner
Internal Medicine
Internal Medicine
Doctor of Medicine (M.D.)
Nurse Practitioner
Certified Nurse Practitioner
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: 5083342731)
Registered at PO BOX 415348, BOSTON, MA 022415348
Psychiatry & Neurology (license number reported to NPPES: MA 1014416)
NPI status registered as active in NPPES database
Registered at 5323 HARRY HINES BLVD, DALLAS, TX 753907201 (Tel: 2146487312)
Registered at 38 LEVERETT ST, LOWELL, MA 018513316 (Tel: 9786774302)
Recorded as TUNG PHAN, MD
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Worcester
- Dr. Geeda Maddaleni, MD
- Dr. Melissa Fischer, MD
- Dr. Jarrod Faucher, DO
- Dr. Diana Suris, DO
- Dr. Srividhya Lakshmanan, MD
- Dr. Paul Sedgwick, MD
Mailing Address
Po Box 415348
Boston, MA 022415348