Nancy Kwon Hsieh, DDS, INC
3400 California St, Suite 302, San Francisco, CA 94118
The registry record
- NPI
- 1609088624
- Registered as
- Type-2 organization (not an individual dentist's personal NPI)
- Dental categories
- General, Pediatric
- Taxonomy codes
- 1223G0001X (General practice dentistry); 1223P0221X (Pediatric dentistry)
- Practice location
- 3400 California St, Suite 302, San Francisco, CA 94118
- Telephone
- (415) 567-1532
- NPI issued
- 3 May 2007 (19 years ago)
- Record updated
- 11 September 2025 (0 years ago)
- NPI status
- NPI active as reported by CMS 2026-08
- Metro area
- San Francisco-Oakland-Fremont, CA (metropolitan area, San Francisco County)
- State
- California (18,604 registered practices)
- Same address
- Y. Clement Shek D.D.S. INC.
- Map position
- Census address match at street level
- Snapshot
- NPPES data dissemination file, 10 August 2026
What the record tells you
Nancy Kwon Hsieh, DDS, INC is an NPI registry record for a dental organization at 3400 California St, Suite 302 in San Francisco, California 94118. CMS issued NPI 1609088624 on 3 May 2007, and the practice last updated its own entry on 11 September 2025. That is recent, so the contact details are likely to be current.
It is registered under 2 dental taxonomy codes: General practice dentistry (1223G0001X), Pediatric dentistry (1223P0221X). That puts it in 2 categories on this site, led by general dentistry. A practice that registers more than one category is telling CMS it does more than one kind of dental work at this address, which is why it has a page here rather than a row. No other address in the registry carries this name, though a practice trading under a chain brand often registers each office under its own legal name, so check the brand as well. One other dental record shares the street address: Y. Clement Shek D.D.S. INC..
San Francisco holds 334 registered dental practices inside the San Francisco-Oakland-Fremont, CA area, which has 1,785 in total on the California side and ranks 3rd in the state. 193 of the San Francisco records also register general dentistry, so this is one of several local options in that category. Across the metro the mix runs general dentistry 58.1%, dental clinic or center 24.5%, orthodontics 6.8%. The closest other registered practices are Y. Clement Shek D.D.S. INC. (0 miles, San Francisco), Bella Smile (0.1 miles, San Francisco) and Courtney K. Fitzpatrick, DDS, INC (0.1 miles, San Francisco), with 2 more inside 0.1 miles.
On our figures a routine adult cleaning in California runs $130 to $200 cash and scaling and root planing $200 to $330 per quadrant, against a US average of $125. This practice's own prices are not in the registry and never will be: NPPES holds identifiers, not fees. Call (415) 567-1532 and ask for the cash price on code D1110, whether the exam and X-rays are included, and whether they run a membership plan if you have no insurance.
Nearest alternatives
The 5 closest registered dental practices to 3400 California St, straight-line distance. Rows without a link are listed on their metro page rather than having one of their own.
| Practice | City | Distance | Categories | Phone on the record |
|---|---|---|---|---|
| Y. Clement Shek D.D.S. INC. | San Francisco, CA | 0 mi | General | (415) 567-2408 |
| Bella Smile | San Francisco, CA | 0.1 mi | Orthodontics | (415) 292-2345 |
| Courtney K. Fitzpatrick, DDS, INC | San Francisco, CA | 0.1 mi | Dental clinic | (415) 563-3522 |
| Blende Dental Group | San Francisco, CA | 0.1 mi | General | (415) 563-4261 |
| Lee and Young Orthodontics | San Francisco, CA | 0.1 mi | Orthodontics | (415) 751-1700 |
The benchmark to hold a quote from Nancy Kwon Hsieh, DDS, INC against. California cost guide.
What to ask when you call
- The cash price for D1110, a routine adult cleaning, and whether the exam (D0120) and X-rays (D0274) are inside or outside that number.
- Whether you need scaling and root planing before a routine clean, and the per-quadrant price for D4341 or D4342 if so.
- Whether they run an in-house membership plan, and what it covers against what it costs a year.
- Whether they are taking new patients and how far out the next hygiene appointment is.
- The practice license, with your state dental board. An NPI is a billing identifier and proves nothing about licensing.
CMS NPPES NPI data file, August 2026, snapshot 10 August 2026. US federal public data (FOIA-disclosable, no charge). CMS NPI files. NPI registry records, status as reported by CMS in the August 2026 data dissemination file. NPPES is an identifier registry, not a license register: an NPI does not validate that a practice is licensed, accredited or currently open. Practices maintain their own NPPES entries. Every page shows the date the record was last updated; addresses and phone numbers are as self-reported and are not verified by us. This page describes a registry record. It is not a review, an endorsement or a check on Nancy Kwon Hsieh, DDS, INC.
Price figures are our own, last verified April 2026. State averages are our estimates compiled from FAIR Health regional cost data and CMS Medicare fee schedules; the ADA discontinued its national Survey of Dental Fees in 2023, so no national fee survey exists. Treat them as a starting point and call two or three offices for an actual quote.