Karen Antwiler, M.D.
NPI 1598255465 · Addiction Medicine (Family Medicine) Physician · Cathedral City, CA
Enrolled with Medicare as Practitioner - Addiction Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Antwiler, M.D. is a Addiction Medicine (Family Medicine) Physician provider in Cathedral City, CA (NPI 1598255465).
Provider details
- NPI number
- 1598255465
- Entity type
- Individual
- Primary specialty
- Addiction Medicine (Family Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A178391 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
8 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
561 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 243 | $122 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 87 | $73 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 78 | $118 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 34 | $172 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 30 | $79 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Buprenorphine Hcl/Naloxone Hclbrand: Buprenorphine-Naloxone | 84 | 18 |
| Trazodone Hcl | 42 | 14 |
| Naltrexone Hcl | 41 | 22 |
| Buprenorphine Hcl | 29 | — |
| Baclofen | 29 | — |
| Gabapentin | 26 | 12 |
| Acamprosate Calcium | 21 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$254 across 7 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 39000 Bob Hope DrRancho Mirage, CA 92270-3221Phone: (760) 340-3911Fax: (760) 837-8994
Registry dates
- Enumerated
- 2018-05-15
- Last updated
- 2025-02-04
- Certified
- 2025-02-04
Frequently asked questions
- What is Karen Antwiler's NPI number?
- Karen Antwiler's National Provider Identifier (NPI) is 1598255465, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Antwiler's specialty?
- Karen Antwiler is listed in the NPPES registry with a primary specialty of Addiction Medicine (Family Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Antwiler located?
- Karen Antwiler's practice location on file with NPPES is 67780 E Palm Canyon Dr, Cathedral City, CA 92234-5441.
- What is Karen Antwiler's phone number?
- The practice phone number listed in the NPPES registry for Karen Antwiler is (760) 773-4300.
- Does Karen Antwiler accept Medicare?
- Karen Antwiler is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Antwiler's NPI active?
- Yes — Karen Antwiler's NPI (1598255465) is active in the NPPES registry as of the last update on 2025-02-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.