Doctor profile · Federal record
Dr. William Ershler, M.D.
Hematology & Oncology Physician (CMS: Internal Medicine) · Fairfax, VA
- NPI 1669496881
- Accepts Medicare
- 52 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
8501 Arlington Blvd Ste 340
Fairfax, VA 22031
(703) 207-0733 - Additional location
-
6400 Arlington Blvd, Suite 940
Falls Church, VA 220422325
(703) 241-1010
fax (703) 241-7723 - Mailing address
-
8110 Gatehouse RD Ste 300W
Falls Church, VA 220421253
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- November 27, 2023
- Year of graduation
- 1974 — 52 yrs since
- Specialty taxonomy
- 207RH0003X — NUCC code
- State license (1)
- Virginia #0101054727
- Medicaid
- VA #005862493
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1669496881. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
155
Distinct HCPCS
5
Medicare allowed
$20,151
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 68 | 33 | $106 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 29 | 20 | $132 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 23 | 23 | $144 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 19 | 11 | $138 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 16 | 16 | $201 |
In context: peer comparison
Among 7 peers in this city , average services per provider: 1,248. This provider delivers 0.1× the peer median.Open Payments
Industry payments received
All-time total
$20,908
Transactions
16
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| PFIZER INC. | 16 | $20,908.02 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
16
Patients
0
Total drug cost
$401
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Hydromorphone Hcl | Generic | 16 | 0 | $401 |
Hospital affiliations
Frequently asked questions
What is Dr. William Ershler's medical specialty?
Dr. William Ershler practices Hematology & Oncology Physician in Fairfax, VA.
Where does Dr. William Ershler practice?
Dr. William Ershler practices at 8501 Arlington Blvd Ste 340, Fairfax, VA 22031. Office phone: 7032070733.
What is Dr. William Ershler's NPI?
Dr. William Ershler's National Provider Identifier (NPI) is 1669496881, issued by NPPES.
Does Dr. William Ershler accept Medicare assignment?
Yes. Dr. William Ershler accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William Ershler commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222). Source: CMS Medicare Physician & Other Practitioners file.