Katherine Au, LMFT
NPI 1619309002 · Marriage & Family Therapist · Hayward, CA
Enrolled with Medicare as Practitioner - Marriage and Family Therapist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Au, LMFT is a Marriage & Family Therapist provider in Hayward, CA (NPI 1619309002).
Provider details
- NPI number
- 1619309002
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- LMFT
- Sex
- Female
- Sole proprietor
- No
- License
- 95747 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
12 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
29 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) |
|---|---|---|
| Psychiatric Diagnostic Evaluation90791 | 29 | $147 |
Typical Medicare-allowed amounts for these services range $147–$147 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-08-07
- Last updated
- 2019-09-24
Frequently asked questions
- What is Katherine Au's NPI number?
- Katherine Au's National Provider Identifier (NPI) is 1619309002, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Au's specialty?
- Katherine Au is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Katherine Au located?
- Katherine Au's practice location on file with NPPES is 1345 B St, Hayward, CA 94541-2917.
- What is Katherine Au's phone number?
- The practice phone number listed in the NPPES registry for Katherine Au is (510) 999-6599.
- Does Katherine Au accept Medicare?
- Katherine Au is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Au's NPI active?
- Yes — Katherine Au's NPI (1619309002) is active in the NPPES registry as of the last update on 2019-09-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.