Doctor profile · Federal record
Dr. Mark Christiansen, MD
Endocrinology, Diabetes & Metabolism Physician · Walnut Creek, CA
- NPI 1821108218
- 20 yrs on file
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
2405 Shadelands Dr Ste 300
Walnut Creek, CA 945985906
(925) 939-8585 - Additional location
-
5725 W Las Positas Blvd, #210
Pleasanton, CA 945884007
(925) 463-1400
fax (925) 251-9026 - Mailing address
-
Po Box 31396
Walnut Creek, CA 945988396
Credentials & registration
- NPI registered
- August 2006 — 20 yrs on file
- Profile last updated
- June 23, 2021
- Specialty taxonomy
- 207RE0101X — NUCC code
- State license (1)
- California #G62892
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1821108218. Last verified May 11, 2026.Open Payments
Industry payments received
All-time total
$479
Transactions
5
Manufacturers
3
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Medtronic, INC. | 3 | $320.72 | |
| AstraZeneca Pharmaceuticals Lp | 1 | $108.00 | |
| Dexcom, INC. | 1 | $50.62 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
84
Patients
0
Total drug cost
$45,072
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Levothyroxine Sodium | Generic | 35 | 0 | $866 |
| Liothyronine Sodium | Generic | 20 | 0 | $841 |
| Novolog (Insulin Aspart) | Brand | 17 | 0 | $21,589 |
| Ozempic (Semaglutide) | Brand | 12 | 0 | $21,776 |
Frequently asked questions
What is Dr. Mark Christiansen's medical specialty?
Dr. Mark Christiansen practices Endocrinology, Diabetes & Metabolism Physician in Walnut Creek, CA.
Where does Dr. Mark Christiansen practice?
Dr. Mark Christiansen practices at 2405 Shadelands Dr Ste 300, Walnut Creek, CA 945985906. Office phone: 9259398585.
What is Dr. Mark Christiansen's NPI?
Dr. Mark Christiansen's National Provider Identifier (NPI) is 1821108218, issued by NPPES.