Maxwell Merkow, MD
NPI 1194951723 · Neurological Surgery Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Neurosurgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maxwell Merkow, MD is a Neurological Surgery Physician provider in Walnut Creek, CA (NPI 1194951723).
Provider details
- NPI number
- 1194951723
- Entity type
- Individual
- Primary specialty
- Neurological Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A147272 (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
17 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
414 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 | 157 | $154 |
| Fusion of Additional Segment of Spine22614 | 39 | $404 |
| Insertion of Cage Or Mesh Device to Spine Bone and Disc Space During Spine Fusion22853 | 25 | $266 |
| Partial Removal of Spine Bone With Release of Spinal Cord And/Or Nerves, Each Additional Segment63048 | 23 | $216 |
| Partial Removal of Spine Bone With Release of Lower Spinal Cord And/Or Nerves, 1 Segment63047 | 22 | $1,143 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$8,913 across 9 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
- 2009-06-10
- Last updated
- 2025-02-26
- Certified
- 2025-02-26
Frequently asked questions
- What is Maxwell Merkow's NPI number?
- Maxwell Merkow's National Provider Identifier (NPI) is 1194951723, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maxwell Merkow's specialty?
- Maxwell Merkow is listed in the NPPES registry with a primary specialty of Neurological Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Maxwell Merkow located?
- Maxwell Merkow's practice location on file with NPPES is 130 La Casa Via # 2-210, Walnut Creek, CA 94598-3045.
- What is Maxwell Merkow's phone number?
- The practice phone number listed in the NPPES registry for Maxwell Merkow is (925) 309-5155.
- Does Maxwell Merkow accept Medicare?
- Maxwell Merkow is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maxwell Merkow's NPI active?
- Yes — Maxwell Merkow's NPI (1194951723) is active in the NPPES registry as of the last update on 2025-02-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.