Ruchi Singh, DO
Ruchi Singh, DO is a Pediatrics Physician in Mission Viejo, CA, registered under NPI 1003559774. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Mission Viejo, based on OpenStreetMap data collected Sep 14, 2026. Parking is available about 0.21 mi away. There is EV charging 0.36 mi from the office — useful if you are driving in from out of town. The nearest transit stop is 625 ft away, served by Crown Valley-Shops At Mission Viejo.
Getting here and what is nearby
Transit Medical Center-Crown Valley 145 ft ~1 min
Transit Medical Center/Crown Valley Northbound 157 ft ~1 min
Parking 377 ft ~2 min
26862 Crown Valley Parkway, Mission Viejo 92691
Transit Crown Valley-Shops At Mission Viejo 625 ft ~3 min
Parking 889 ft ~4 min
26732 Crown Valley Parkway, Mission Viejo 92691
Convenience 76 934 ft ~4 min
26411 Crown Valley Parkway, Mission Viejo 92691
Gas station 76 1,003 ft ~4 min
Parking 0.21 mi ~5 min
264 The Shops At Mission Viejo, Mission Viejo 92691
Convenience ampm 0.23 mi ~5 min
27682 Crown Valley Parkway, Mission Viejo 92691
Gas station Arco 0.25 mi ~5 min
27682 Crown Valley Parkway, Mission Viejo 92691
Gas station Chevron 0.28 mi ~6 min
27742 Crown Valley Parkway, Mission Viejo 92691
EV charging Mission Viejo - Crown Valley Parkway Supercharger 0.29 mi ~6 min
Restaurant Paul's Pantry 0.29 mi ~6 min
27407 Bellogente, Mission Viejo 92691
Restaurant Sal's Pizzeria 0.29 mi ~6 min
27741 Crown Valley Parkway, Mission Viejo 92691
Su-Th 11:00-20:00, Fr-Sa 11:00-21:00
Restaurant Anchor Hitch Restaurant 0.29 mi ~6 min
27741 Crown Valley Parkway, Mission Viejo 92691
EV charging Tesla Supercharger 0.35 mi ~8 min
EV charging 0.36 mi ~8 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 21749 | CA | Pediatrics Physician primary |
This provider holds licence 21749 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Pediatrics covers
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development. NUCC Health Care Provider Taxonomy, code 208000000X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003559774 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 19, 2022 |
| Last updated | May 1, 2026 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | DO |
| Practice address |
26800 CROWN VALLEY PKWY STE 510 Mission Viejo, CA 92691 (949) 364-8700 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 5 | 5 | 9 | 7 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 5 | 9 | 7 | 5 |
Sum = 56 · next multiple of 10 = 60 · check digit = 4 · actual last digit = 4
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.