John Hau, M.D.
NPI 1922231042 · Pain Medicine (Anesthesiology) Physician · Santa Rosa, CA
Enrolled with Medicare as Practitioner - Pain Management · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Hau, M.D. is a Pain Medicine (Anesthesiology) Physician provider in Santa Rosa, CA (NPI 1922231042).
Provider details
- NPI number
- 1922231042
- Entity type
- Individual
- Primary specialty
- Pain Medicine (Anesthesiology) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A123619 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
16 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,237 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 | 880 | $129 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 267 | $92 |
| Testing for Presence of Drug, By Chemistry Analyzers80307 | 260 | $61 |
| Injection of Anesthetic And/Or Steroid Drug Into Sacral Spine Nerve Root Using Imaging Guidance, Single Level64483 | 153 | $135 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 108 | $168 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'S |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 352 | 118 |
| Gabapentin | 238 | 71 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 158 | 41 |
| Oxycodone Hcl | 138 | 53 |
| Tramadol Hcl | 133 | 43 |
| Pregabalin | 130 | 43 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,246 across 67 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
Registry dates
- Enumerated
- 2009-08-24
- Last updated
- 2014-06-09
Frequently asked questions
- What is John Hau's NPI number?
- John Hau's National Provider Identifier (NPI) is 1922231042, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Hau's specialty?
- John Hau is listed in the NPPES registry with a primary specialty of Pain Medicine (Anesthesiology) Physician (Allopathic & Osteopathic Physicians).
- Where is John Hau located?
- John Hau's practice location on file with NPPES is 392 Tesconi Ct, Santa Rosa, CA 95401-4653.
- What is John Hau's phone number?
- The practice phone number listed in the NPPES registry for John Hau is (707) 623-9803.
- Does John Hau accept Medicare?
- John Hau is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Hau's NPI active?
- Yes — John Hau's NPI (1922231042) is active in the NPPES registry as of the last update on 2014-06-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.