Mary Kastner, PMHNP
NPI 1073664231 · Psychiatric/Mental Health Nurse Practitioner · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Certified Clinical Nurse Specialist (cns) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Kastner, PMHNP is a Psychiatric/Mental Health Nurse Practitioner provider in Walnut Creek, CA (NPI 1073664231).
Provider details
- NPI number
- 1073664231
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PMHNP
- Sex
- Female
- Sole proprietor
- No
- License
- NP17412 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
569 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 302 | $92 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 173 | $63 |
| Assessment of Emotional Or Behavioral Problems96127 | 82 | $6 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 12 | $127 |
Typical Medicare-allowed amounts for these services range $6–$127 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 64 | 12 |
| Bupropion Hclbrand: Bupropion Xl | 55 | 12 |
| Quetiapine Fumarate | 47 | — |
| Buspirone Hcl | 45 | — |
| Trazodone Hcl | 38 | — |
| Duloxetine Hcl | 36 | — |
| Lorazepam | 27 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-15
- Last updated
- 2022-11-15
- Certified
- 2022-11-15
Frequently asked questions
- What is Mary Kastner's NPI number?
- Mary Kastner's National Provider Identifier (NPI) is 1073664231, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Kastner's specialty?
- Mary Kastner is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Kastner located?
- Mary Kastner's practice location on file with NPPES is 2960 Camino Diablo Ste 105, Walnut Creek, CA 94597-3945.
- What is Mary Kastner's phone number?
- The practice phone number listed in the NPPES registry for Mary Kastner is (800) 892-2695.
- Does Mary Kastner accept Medicare?
- Mary Kastner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Kastner's NPI active?
- Yes — Mary Kastner's NPI (1073664231) is active in the NPPES registry as of the last update on 2022-11-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.