Karen Tinder, NP
NPI 1225442080ActiveIndividual· Nurse Practitioner, Family· Walnut Creek, CA
Nurse Practitioner, Family (NP) with John Muir Physician Network, practicing in Walnut Creek, California. Their prescriptions cost Medicare Part D more than their services did: $971,935 for 2,922 claims, against $144,997 paid for services in 2024. Novo Nordisk Inc was the largest of 33 companies reporting payments in 2025, $3,110 in all, mostly food and beverage. Lists John Muir Medical Center - Concord Campus and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1225442080 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | NP |
| Sole proprietor | No |
| NPI issued | Jun 19, 2014 |
| Last updated in NPPES | Feb 11, 2025 |
| Certified by provider | Feb 11, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | 488386 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nurse Practitioner (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 353 |
|---|---|
| Services billed | 8,034 across 32 procedure codes |
| Paid by Medicare | $144,997 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,922 · 6,615 30-day fills |
|---|---|
| Patients | 391 |
| Total drug cost | $971,935 |
| Generic share | 64% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- John Muir Physician NetworkPleasant Hill, CA · 494 clinicians
Hospital affiliations
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
- San Ramon Regional Medical CenterSan Ramon, CA
- Stanford Health Care Tri-ValleyPleasanton, CA
Other facilities
- John Muir Home Health ServicesHome health agency · Concord, CA
Industry payments (Open Payments)
- 2025$3,110 · 113 payments from 33 companies
- 2024$3,516 · 117 payments from 29 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $494.48 | 23 |
| Amgen Inc. | $411.68 | 19 |
| Beta Bionics, Inc. | $261.00 | 4 |
| Xeris Pharmaceuticals, Inc. | $190.48 | 5 |
| Dexcom, Inc. | $176.76 | 4 |
What the 2025 payments were for
- Food and Beverage$3,110 · 113 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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