Doctor profile · Federal record
Dr. William Tan, MD
Internal Medicine Physician (CMS: Internal Medicine) · Eldersburg, MD
- NPI 1386754455
- Accepts Medicare
- MIPS 88.2 / 100 · 2023
- 42 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1645 Liberty RD
Eldersburg, MD 217846521
(410) 795-7737
fax (410) 795-2828
Credentials & registration
- NPI registered
- August 2006 — 20 yrs on file
- Profile last updated
- July 8, 2007
- Year of graduation
- 1984 — 42 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Maryland #D34849
- Medicaid
- MD #232951400
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1386754455. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,429
Distinct HCPCS
10
Medicare allowed
$171,829
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 684 | 307 | $82 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 327 | 208 | $116 | |
93000 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 195 | 177 | $15 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 189 | 189 | $135 | |
82962 |
Blood glucose (sugar) test performed by hand-held instrument | 182 | 79 | $3 | |
93793 |
Anticoagulant management of patient taking warfarin | 118 | 12 | $12 | |
99441 |
Telephone medical discussion with physician, 5-10 minutes | 112 | 89 | $51 | |
90662 |
Influenza vaccine split virus, preservative free | 95 | 94 | $72 | |
G0008 |
Administration of influenza virus vaccine | 93 | 92 | $32 | |
81002 |
Urinalysis, manual test | 88 | 79 | $3 |
In context: peer comparison
Among 3 peers in Eldersburg Internal Medicine Physician, average services per provider: 104. This provider delivers 23× the peer median.Open Payments
Industry payments received
All-time total
$45
Transactions
2
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Amgen INC. | 2 | $45.47 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
2,669
Patients
714
Total drug cost
$33,940
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 397 | 107 | $5,730 |
| Amlodipine Besylate | Generic | 282 | 81 | $2,308 |
| Levothyroxine Sodium | Generic | 241 | 54 | $4,927 |
| Lisinopril | Generic | 212 | 56 | $1,995 |
| Furosemide | Generic | 184 | 55 | $1,081 |
| Hydrochlorothiazide | Generic | 178 | 52 | $682 |
| Omeprazole | Generic | 155 | 50 | $2,427 |
| Losartan Potassium | Generic | 152 | 40 | $2,039 |
| Pravastatin Sodium | Generic | 136 | 34 | $2,131 |
| Gabapentin | Generic | 131 | 31 | $2,525 |
Frequently asked questions
What is Dr. William Tan's medical specialty?
Dr. William Tan practices Internal Medicine Physician in Eldersburg, MD.
Where does Dr. William Tan practice?
Dr. William Tan practices at 1645 Liberty RD, Eldersburg, MD 217846521. Office phone: 4107957737.
What is Dr. William Tan's NPI?
Dr. William Tan's National Provider Identifier (NPI) is 1386754455, issued by NPPES.
Does Dr. William Tan accept Medicare assignment?
Yes. Dr. William Tan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William Tan commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214); Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (HCPCS 93000). Source: CMS Medicare Physician & Other Practitioners file.