Doctor profile · Federal record
Dr. Stefan Willging, MD
Internal Medicine Physician (CMS: Internal Medicine) · San Diego, CA
- NPI 1679523518
- Accepts Medicare
- 27 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
4060 4Th Ave, Suite 505
San Diego, CA 92103
(619) 298-1311
fax (619) 298-0843
Credentials & registration
- NPI registered
- May 2006 — 20 yrs on file
- Profile last updated
- February 25, 2015
- Year of graduation
- 1999 — 27 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #A81537
- Medicaid
- CA #GR0086930
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1679523518. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
4,237
Distinct HCPCS
10
Medicare allowed
$279,136
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99490 |
Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | 899 | 198 | $66 | |
J3301 |
Injection, triamcinolone acetonide, not otherwise specified, 10 mg | 849 | 77 | $1 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 514 | 381 | $96 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 508 | 318 | $137 | |
G0444 |
Annual depression screening, 5 to 15 minutes | 357 | 357 | $20 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 354 | 354 | $138 | |
J2001 |
Injection, lidocaine hcl for intravenous infusion, 10 mg | 95 | 29 | $0 | |
20610 |
Aspiration and/or injection of fluid from large joint | 87 | 55 | $76 | |
G0008 |
Administration of influenza virus vaccine | 87 | 87 | $33 | |
90694 |
Influenza vaccine, quadrivalent inactivated, 0.5 ml dosage | 85 | 85 | $76 |
In context: peer comparison
Among 193 peers in this city , average services per provider: 141. This provider delivers 30× the peer median.Open Payments
Industry payments received
All-time total
$1,989
Transactions
80
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| ABBVIE INC. | 20 | $442.75 | |
| GlaxoSmithKline, LLC. | 9 | $172.64 | |
| Novartis Pharmaceuticals Corporation | 7 | $162.22 | |
| Lilly USA, LLC | 6 | $154.45 | |
| Novo Nordisk Inc | 9 | $140.33 | |
| AstraZeneca Pharmaceuticals LP | 8 | $130.16 | |
| Gilead Sciences, Inc. | 5 | $118.51 | |
| Kyowa Kirin, Inc. | 1 | $91.98 | |
| PFIZER INC. | 4 | $83.52 | |
| Exact Sciences Corporation | 2 | $66.64 | |
| Boehringer Ingelheim Pharmaceuticals, Inc. | 2 | $51.41 | |
| Seqirus USA Inc | 2 | $47.09 | |
| Amgen Inc. | 2 | $39.38 | |
| Bayer Healthcare Pharmaceuticals Inc. | 2 | $33.20 | |
| SANOFI PASTEUR INC. | 1 | $28.31 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
2,934
Patients
814
Total drug cost
$55,502
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 438 | 124 | $5,445 |
| Levothyroxine Sodium | Generic | 332 | 92 | $6,608 |
| Rosuvastatin Calcium | Generic | 317 | 85 | $10,307 |
| Alprazolam | Generic | 240 | 63 | $2,086 |
| Amlodipine Besylate | Generic | 218 | 55 | $1,595 |
| Escitalopram Oxalate | Generic | 172 | 52 | $3,493 |
| Pantoprazole Sodium | Generic | 171 | 48 | $2,951 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 157 | 50 | $4,562 |
| Gabapentin | Generic | 142 | 44 | $4,857 |
| Lisinopril | Generic | 128 | 35 | $1,646 |
Hospital affiliations
Frequently asked questions
What is Dr. Stefan Willging's medical specialty?
Dr. Stefan Willging practices Internal Medicine Physician in San Diego, CA.
Where does Dr. Stefan Willging practice?
Dr. Stefan Willging practices at 4060 4Th Ave, San Diego, CA 92103. Office phone: 6192981311.
What is Dr. Stefan Willging's NPI?
Dr. Stefan Willging's National Provider Identifier (NPI) is 1679523518, issued by NPPES.
Does Dr. Stefan Willging accept Medicare assignment?
Yes. Dr. Stefan Willging accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Stefan Willging commonly perform?
Top Medicare-reported procedures in 2023: Chronic care management services (HCPCS 99490); Injection, triamcinolone acetonide, not otherwise specified, 10 mg (HCPCS J3301); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.