Dr. Theodore Conrad Ang Tan , MD
Internal Medicine • Dover, DE
810 New Burton Rd, Suite 3
Dover, DE 199045488
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. Theodore Conrad Tan is listed in NPPES under Internal Medicine.
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NPI assigned on July 16, 2009; this date does not establish years in practice.
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Published CMS data list 1,749 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:
- 99213 — Established patient outpatient office visit: 518 service units.
- G2211 — Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's: 488 service units.
- 99497 — Advance care planning: 226 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 10 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 6,820 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Atorvastatin Calcium — 599 prescription fills, including refills.
- Amlodipine Besylate — 432 prescription fills, including refills.
- Losartan Potassium — 339 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 105 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 75% of clinicians listed under Internal Medicine in Dover, DE (2024, 30 clinicians with data). Median for this group: 960. Middle half: 686 to 1,703.
More Medicare Part B services than 85% of clinicians listed under Internal Medicine in Delaware (2024, 379 clinicians with data). Median for this group: 725. Middle half: 300 to 1,159.
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 2,171 in 2020 to 1,749 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
810 New Burton Rd
Suite 3
Dover, DE 199045488
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: Delaware Primary Care Llc. 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
1998
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
380 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 $73,202 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 $51,421 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.
30-day fills
16,685 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
$839,721 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 – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $807.70 across 37 records.
By nature of payment
- Food and Beverage: $632.70 across 36 records.
- Consulting Fee: $175.00 across 1 record.
Reporting-company totals (3 largest of 16)
- Amgen Inc.: $269.44 across 8 records.
- Novo Nordisk Inc: $137.84 across 9 records.
- Eli Lilly and Company: $71.90 across 3 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
28 years (graduated 1998)
CMS Doctors and Clinicians data list 1998 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
2009
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. Tan 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. Tan 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 Dover and Delaware
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 75% of clinicians listed under Internal Medicine in Dover, DE (2024, 30 clinicians with data). Median for this group: 960. Middle half: 686 to 1,703.
More Medicare Part B services than 85% of clinicians listed under Internal Medicine in Delaware (2024, 379 clinicians with data). Median for this group: 725. Middle half: 300 to 1,159.
Medicare-allowed amount
A lower Medicare-allowed amount than 60% of clinicians listed under Internal Medicine in Dover, DE (2024, 30 clinicians with data). Median for this group: $87,097. Middle half: $65,138 to $138,740.
Close to the middle for clinicians listed under Internal Medicine in Delaware (2024, 379 clinicians with data). Median for this group: $70,420. Middle half: $31,824 to $110,420.
Paid by Medicare
A lower Medicare payment amount than 70% of clinicians listed under Internal Medicine in Dover, DE (2024, 30 clinicians with data). Median for this group: $67,762. Middle half: $49,422 to $105,190.
Close to the middle for clinicians listed under Internal Medicine in Delaware (2024, 379 clinicians with data). Median for this group: $54,415. Middle half: $24,740 to $87,023.
Medicare Part D prescriptions
More Part D prescriptions than 85% of clinicians listed under Internal Medicine in Dover, DE (2024, 29 clinicians with data). Median for this group: 222. Middle half: 46 to 3,913.
More Part D prescriptions than 85% of clinicians listed under Internal Medicine in Delaware (2024, 343 clinicians with data). Median for this group: 223. Middle half: 60 to 3,145.
Part D drug cost
A higher Part D drug cost than 90% of clinicians listed under Internal Medicine in Dover, DE (2024, 29 clinicians with data). Median for this group: $17,420. Middle half: $281 to $403,257.
A higher Part D drug cost than 90% of clinicians listed under Internal Medicine in Delaware (2024, 343 clinicians with data). Median for this group: $17,490. Middle half: $814 to $271,582.
44 active clinicians are listed under Internal Medicine with a practice address in Dover, DE (601 in Delaware).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Dover
18.2% of these 44 clinicians have the CMS telehealth indicator.
65.9% of these 44 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 19% from 2,171 in 2020 to 1,749 in 2024.
- 2020: 2,171
- 2021: 2,265
- 2022: 2,298
- 2023: 1,784
- 2024: 1,749
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Medicare-allowed amount
Medicare-allowed amount decreased 57% from $168,755 in 2020 to $73,202 in 2024.
- 2020: $168,755
- 2021: $129,673
- 2022: $136,137
- 2023: $102,829
- 2024: $73,202
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Paid by Medicare
Paid by Medicare decreased 62% from $135,785 in 2020 to $51,421 in 2024.
- 2020: $135,785
- 2021: $91,095
- 2022: $98,593
- 2023: $69,787
- 2024: $51,421
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Medicare Part D prescriptions
Medicare Part D prescriptions stayed about the same: 7,216 in 2020 and 6,820 in 2024.
- 2020: 7,216
- 2021: 7,241
- 2022: 7,816
- 2023: 7,164
- 2024: 6,820
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30-day fills
30-day fills stayed about the same: 17,240 in 2020 and 16,685 in 2024.
- 2020: 17,240
- 2021: 17,453
- 2022: 18,629
- 2023: 17,733
- 2024: 16,685
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Part D drug cost
Part D drug cost increased 48% from $568,709 in 2020 to $839,721 in 2024.
- 2020: $568,709
- 2021: $717,254
- 2022: $863,828
- 2023: $945,903
- 2024: $839,721
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Industry payments (Open Payments)
Industry payments (Open Payments) decreased 27% from $1,100.08 in 2021 to $807.70 in 2025.
- 2021: $1,100.08
- 2022: $812.54
- 2023: $576.86
- 2024: $503.48
- 2025: $807.70
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 · 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 – December 31, 2025): 37 records totaling $807.70.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Amgen Inc. |
Consulting Fee
Cash or cash equivalent
|
PROLIA | General | $175.00 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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— | General | $34.33 |
| Ardelyx, Inc. |
Food and Beverage
In-kind items and services
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IBSRELA | General | $27.06 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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JARDIANCE | General | $24.09 |
| Exact Sciences Corporation |
Food and Beverage
In-kind items and services
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The Cologuard Plus Collection Kit | General | $22.33 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
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Ozempic | General | $21.77 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
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Wegovy | General | $21.41 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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BREZTRI | General | $21.40 |
| Dexcom, Inc. |
Food and Beverage
In-kind items and services
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Dexcom G6 Transmitter | General | $21.39 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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PREVNAR 20 | General | $20.91 |
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
|
SHINGRIX | General | $20.87 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
|
JARDIANCE | General | $20.65 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
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Wegovy | General | $20.25 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
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EVENITY | General | $20.18 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
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Rybelsus | General | $19.48 |
| Krystal Biotech Inc |
Food and Beverage
In-kind items and services
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VYJUVEK | General | $19.16 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
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Rybelsus | General | $18.59 |
| Verona Pharma, Inc. |
Food and Beverage
Cash or cash equivalent
|
Ohtuvayre | General | $18.46 |
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
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TRELEGY ELLIPTA | General | $18.33 |
| Xeris Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
GVOKE HYPOPEN | General | $17.89 |
| Astellas Pharma US Inc |
Food and Beverage
In-kind items and services
|
Veozah | General | $17.58 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
|
AIRSUPRA | General | $17.09 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
|
MOUNJARO | General | $16.92 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
|
Ozempic | General | $16.82 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
EVENITY | General | $16.80 |
(top 25 shown)
Source: CMS Open Payments, program year 2025, 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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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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518 | 315 | $110.00 | $70.92 |
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G2211
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's
|
488 | 301 | $20.00 | $15.56 |
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99497
Advance care planning, first 30 minutes
|
226 | 225 | $100.00 | $10.04 |
|
G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
|
219 | 219 | $250.00 | $49.13 |
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G0444
Annual depression screening, 5 to 15 minutes
|
163 | 163 | $30.00 | $18.51 |
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99496
Transitional care management services for problem of high complexity
|
53 | 43 | $300.00 | $139.44 |
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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
|
32 | 30 | $150.00 | $92.64 |
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99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
|
21 | 20 | $70.00 | $53.76 |
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99442
Telephone medical discussion with physician, 11-20 minutes
|
17 | 16 | $70.00 | $69.07 |
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93000
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report
|
12 | 12 | $65.00 | $14.03 |
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 |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 599 | 48,481 | $6,211.29 | 167 |
| Amlodipine Besylate | Amlodipine Besylate | 432 | 35,784 | $2,676.81 | 116 |
| Losartan Potassium | Losartan Potassium | 339 | 27,597 | $3,704.29 | 93 |
| Levothyroxine Sodium | Levothyroxine Sodium | 237 | 19,667 | $2,233.31 | 61 |
| Metformin Hcl | Metformin Hcl | 237 | 18,650 | $1,425.91 | 68 |
| Lisinopril | Lisinopril | 229 | 18,284 | $2,172.35 | 59 |
| Jardiance | Empagliflozin | 224 | 15,444 | $300,794.80 | 56 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 202 | 6,328 | $5,163.94 | 55 |
| Fluticasone Propionate | Fluticasone Propionate | 196 | 13,935 | $5,363.21 | 94 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 181 | 15,157 | $3,028.75 | 55 |
| Pantoprazole Sodium | Pantoprazole Sodium | 180 | 13,864 | $1,979.96 | 57 |
| Metoprolol Succinate | Metoprolol Succinate | 168 | 14,305 | $2,141.41 | 46 |
| Carvedilol | Carvedilol | 161 | 13,142 | $1,141.19 | 46 |
| Azelastine Hcl | Azelastine Hcl | 159 | 6,920 | $4,302.31 | 86 |
| Pravastatin Sodium | Pravastatin Sodium | 143 | 10,988 | $3,149.73 | 36 |
| Tamsulosin Hcl | Tamsulosin Hcl | 118 | 9,810 | $1,349.18 | 28 |
| Hydrochlorothiazide | Hydrochlorothiazide | 115 | 9,708 | $523.88 | 37 |
| Omeprazole | Omeprazole | 111 | 9,030 | $1,500.87 | 35 |
| Gabapentin | Gabapentin | 104 | 7,542 | $1,898.40 | 30 |
| Sertraline Hcl | Sertraline Hcl | 104 | 7,496 | $711.19 | 34 |
| Glipizide Er | Glipizide | 93 | 7,048 | $871.61 | 22 |
| Montelukast Sodium | Montelukast Sodium | 90 | 6,371 | $898.76 | 24 |
| Furosemide | Furosemide | 79 | 6,585 | $311.71 | 27 |
| Trulicity | Dulaglutide | 76 | 3,416 | $114,888.06 | 15 |
| Allopurinol | Allopurinol | 75 | 6,030 | $741.19 | 21 |
(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
NUCC 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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20120927000038
DE
4880843390
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
Delaware Primary Care Llc
810 New Burton Rd, Dover, DE 199045488
Phone: 3027300554
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
Master of Science in Nursing, Family Nurse Practitioner (Certified)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.), MR, COG
Nurse Practitioner - Primary Care
Career & Practice History
NPI enumerated July 16, 2009.
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 Internal Medicine Providers in Dover
- Dr. Brian Benson, MD
- Dr. Jonathan Simon, MD
- Dr. Michael Sweeney, MD
- Dr. Vijayasekhar Tatagari, MD
- Dr. Sandeep Mann, MD
- Dr. Zulehuma Rather, MD
More public profiles in Delaware
Directory navigation, in NPI number order.
- Gabriella Zaccone Physician Assistant · Newark
- Ashlie Artz, PT, DPT, ATC Physical Therapist · Newark
- Wendy Corkran, CRNP Nurse Practitioner - Family · Delmar
- Gabriel Pelaez, PA-C Physician Assistant · New Castle
- Samantha Hussnatter, MSN, APRN, FNP-C Nurse Practitioner · Wilmington
- Muriel Jurasevich, CRNP Nurse Practitioner - Acute Care · Newark
- Melissa Martinelli, MS, OTR, L, CLT Occupational Therapist · Lewes
- Lavonya Moore, LPCMH Counselor - Mental Health · Wilmington
- Sumukh Arun Kumar, MD Internal Medicine - Hematology & Oncology · Dover
- Madison Strickland, PT, DPT Physical Therapist · Newark
- Michael Davis, PA-C Physician Assistant · Hockessin
- Meredith Phillips-Woodard, LCSW Social Worker - Clinical · Seaford
Mailing Address
810 New Burton Rd, Suite 3
Dover, DE 199045488
Phone: 3027300554