Mark Christiansen
Endocrinology, Diabetes & Metabolism · Walnut Creek, CANPI 1821108218
Payments from drug & device makers
Across 3,783 payments — averaging $6060.02 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Dexcom, Inc.$5.6M
- Senseonics, Incorporated$3.7M
- Medtronic$2.8M
- Eli Lilly$2.8M
- Abbott$2.3M
- Novo Nordisk AS$1.6M
- plus $4.1M from 16 others
Across 9 payments — averaging $16,949 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Ascensia Diabetes Care US Inc.$105K
- Eli Lilly$46K
- Lexicon Pharmaceuticals, Inc.$2K
What the payments were for
- Consulting fees$2,25048%
- Travel & lodging$60213%
- Food & beverage$1,52533%
- Education$2906%
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| Dexcom, Inc. | 68 | $5,638,356 |
| Senseonics, Incorporated | 69 | $3,683,161 |
| Medtronic(2 entities) | 145 | $2,838,407 |
| Eli Lilly | 31 | $2,754,566 |
| Abbott | 353 | $2,283,303 |
| Novo Nordisk AS | 2,612 | $1,637,588 |
| Amgen | 8 | $1,115,741 |
| Boehringer Ingelheim | 45 | $856,716 |
| Roche Diabetes Care, Inc. | 5 | $685,237 |
| Ascensia Diabetes Care US Inc. | 3 | $412,937 |
| AstraZeneca | 2 | $310,893 |
| Lexicon Pharmaceuticals, Inc. | 18 | $134,306 |
| Sanofi US Services Inc. | 20 | $129,164 |
| Merck | 160 | $116,330 |
| Vertex | 3 | $113,267 |
| Mannkind Corporation | 4 | $78,761 |
| Radius Health, Inc. | 17 | $65,020 |
| Boehringer Ingelheim International GmbH | 133 | $34,720 |
| Alnylam Pharmaceuticals Inc. | 3 | $24,877 |
| Boehringer Ingelheim France S.a.s. | 73 | $11,155 |
| Novo Nordisk | 9 | $290 |
| Tandem Diabetes Care, Inc. | 2 | $249 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
- AFREZZA$2,250
- MINIMED 780G$635
- Minimed 670G System$494
- t:slim X2 Insulin Pump with Control-IQ$249
- Tymlos$104
How this compares
$22,925,044 in reported general payments places this provider in the 95th percentile of 952 endocrinology, diabetes & metabolism providers in California.
See all endocrinology, diabetes & metabolism providers in California →
Other endocrinology, diabetes & metabolism in Walnut Creek
- Bonnie KimmelWalnut Creek$2.8M
- Yeran BaoWalnut Creek$641K
- Jerrold OlefskySan Diego$26.5M
- Timothy BaileyEscondido$22.3M
- Stanley HsiaLos Angeles$19.8M
- Juan FriasSan Diego$14.1M
- Paul NorwoodFresno$6.2M
- Athena Philis-Tsimikasla Jolla$6M
- David AhnNewport Beach$5.8M
- Shlomo MelmedLos Angeles$3.3M
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.