Health Diagnostics of California LLC
4144 Redwood Hwy, Suite B, San Rafael, CA 94903
DirectionsGoogle MapsApple MapsRegistry Record
- NPI
- 1699706648
- Type
- Radiology clinic/centre
- Taxonomy codes
- 261QR0200X (Radiology clinic/center)
- Practice location
- 4144 Redwood Hwy, Suite B, San Rafael, CA 94903
- Telephone
- (415) 479-9907
- NPI issued
- 6 July 2006 (20 years ago)
- Record updated
- 20 December 2011 (14 years ago)
- NPI status
- NPI active as reported by CMS 2026-08
- Metro area
- San Francisco-Oakland-Fremont, CA (metropolitan area, Marin County)
- State
- California (1,312 records statewide)
- Sibling NPIs
- Progressive Radiology Services (1124296439)
- Map position
- Census address match (rooftop level)
- Snapshot
- NPPES data dissemination file, 10 August 2026
What the Record Tells You
Health Diagnostics of California LLC is an NPI registry record for a radiology clinic/centre at 4144 Redwood Hwy, Suite B in San Rafael, California 94903. CMS issued NPI 1699706648 on 6 July 2006, and the organisation last updated its own entry on 20 December 2011. That was 14 years ago, so treat the phone number and suite as unverified until you have spoken to someone there.
The record carries one imaging taxonomy code: Radiology clinic/center (261QR0200X). It registered as a radiology clinic without the MRI-specific code, so ask which modalities it operates before assuming an MRI is available. The same business holds a sibling registration at this address under the name Progressive Radiology Services (NPI 1124296439); they are covered by this page rather than given their own.
San Rafael sits in the San Francisco-Oakland-Fremont, CA metropolitan area (Marin County), which has 129 imaging-centre records on the California side in the August 2026 file, 11 of them with the MRI code, out of 1,312 across California. The nearest alternatives in the registry are Marin Petct Imaging, LLC (0.4 miles, San Rafael), Marin Imaging (2.5 miles, San Anselmo) and Clarity Radiology, LLC (4.3 miles, Greenbrae), with 1 more within 4.5 miles.
For a cash-pay benchmark, our California range is $600 to $1,800 at freestanding imaging centres and $2,200 to $7,500 at hospitals for a typical single-region MRI. This centre's own prices are not in the registry: call (415) 479-9907 with the CPT code for your scan and ask for the self-pay rate, whether the radiologist's report is included, and the scanner's field strength.
Nearest Alternatives
The 4 closest imaging records to 4144 Redwood Hwy, straight-line distance. Rows without a link are name-classified radiology organisations or records outside a metro page.
| Centre | City | Distance | Type | Phone (registry) |
|---|---|---|---|---|
| Marin Petct Imaging, LLC | San Rafael, CA | 0.4 mi | Radiology clinic | (401) 722-1494 |
| Marin Imaging | San Anselmo, CA | 2.5 mi | Radiology clinic | (415) 454-1750 |
| Clarity Radiology, LLC | Greenbrae, CA | 4.3 mi | Radiology org. (name-classified) | (954) 605-7088 |
| California Advanced Imaging Medical Assoc., INC. | Greenbrae, CA | 4.5 mi | MRI + radiology | (415) 464-8080 |
Health Diagnostics of California LLC in amber, with the 4 nearest registry records in teal. Boundary drawn: Marin County outline.
Map data: OpenFreeMap, © OpenMapTiles, data from OpenStreetMap contributors. Boundaries: US Census Bureau cartographic boundary files.
Cash-Price Benchmark
What to ask when you call
- The self-pay price for your exact CPT code (70551 brain, 72148 lumbar spine, 73221 or 73721 joint, without contrast), and whether the radiologist's report is included.
- Scanner field strength (1.5T or 3T) and whether it is closed, wide-bore or open.
- ACR or IAC accreditation, and who reads the images. The registry cannot tell you either.
- Whether they accept an order from a telehealth referral if you have no local doctor.
Full list: cheap MRI, good MRI checklist.
Source: NPI registry records, status as reported by CMS, August 2026 file (NPPES data dissemination file dated 10 August 2026, download.cms.gov; US federal public data, no charge). NPPES is an identifier registry, not a licence register: an NPI does not validate licensure, accreditation or that a scanner is on site. Names, addresses and phones are as self-reported to CMS and many records have not been updated for years; confirm before you travel. Coordinates: US Census Bureau geocoder, ZIP-code centroid where the address did not match (flagged). Metro areas: 2023 Census core-based statistical areas by county. Price ranges: our methodology; hospital cash prices: each hospital's federal transparency file (45 CFR 180), where parsed. No centre pays to be listed and none is endorsed. Listed here in error, or want a correction? Email [email protected]. This page describes a registry record, not a review or recommendation of Health Diagnostics of California LLC.