John Geiss, D.O.
John Geiss, D.O. is a Family Medicine Physician in Santa Ana, CA, registered under NPI 1053651497. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 5 HUTTON CENTRE DR STE 950, Santa Ana, CA 92707. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 20A12647 | CA | Family Medicine Physician primary |
This provider holds licence 20A12647 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Family Practice
- PAC ID
- 5890933071
Enrolled in Medicare 43 times, across 42 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| California | I20130529000756 | Practitioner - Family Practice |
| Idaho | I20210825002921 | Practitioner - Family Practice |
| Arizona | I20211104002956 | Practitioner - Family Practice |
| Nevada | I20220506001358 | Practitioner - Family Practice |
| Tennessee | I20230919000072 | Practitioner - Osteopathic Manipulative Medicine |
| Oregon | I20230928002351 | Practitioner - Family Practice |
| Utah | I20231025000743 | Practitioner - Family Practice |
| Texas | I20231204000186 | Practitioner - Family Practice |
| Colorado | I20240131001032 | Practitioner - Family Practice |
| Georgia | I20240306000285 | Practitioner - Family Practice |
| Alabama | I20240306000451 | Practitioner - Family Practice |
| Montana | I20240307000932 | Practitioner - Family Practice |
| Florida | I20240307001703 | Practitioner - Family Practice |
| Indiana | I20240313000359 | Practitioner - Family Practice |
| Nebraska | I20240313001199 | Practitioner - Family Practice |
| Mississippi | I20240426001751 | Practitioner - Family Practice |
| Maine | I20240530001503 | Practitioner - Family Practice |
| Idaho | I20240530001815 | Practitioner - Osteopathic Manipulative Medicine |
| Connecticut | I20240530002055 | Practitioner - Family Practice |
| Oklahoma | I20240603000819 | Practitioner - Family Practice |
| Minnesota | I20240718001998 | Practitioner - Osteopathic Manipulative Medicine |
| Kentucky | I20240803000431 | Practitioner - Osteopathic Manipulative Medicine |
| Ohio | I20240917001450 | Practitioner - Osteopathic Manipulative Medicine |
| Wisconsin | I20240920001888 | Practitioner - Osteopathic Manipulative Medicine |
| New Jersey | I20241004003341 | Practitioner - Osteopathic Manipulative Medicine |
| North Carolina | I20250106002562 | Practitioner - Osteopathic Manipulative Medicine |
| Louisiana | I20250129002528 | Practitioner - Family Practice |
| Illinois | I20250204002316 | Practitioner - Family Practice |
| New York | I20250212002282 | Practitioner - Family Practice |
| Washington | I20250212002408 | Practitioner - Osteopathic Manipulative Medicine |
| South Dakota | I20250212002641 | Practitioner - Family Practice |
| Massachusetts | I20250226001897 | Practitioner - Family Practice |
| Maryland | I20250313002505 | Practitioner - Family Practice |
| Pennsylvania | I20250319001426 | Practitioner - Osteopathic Manipulative Medicine |
| New Hampshire | I20250807004220 | Practitioner - Family Practice |
| Delaware | I20250815003334 | Practitioner - Family Practice |
| Virginia | I20250818001257 | Practitioner - Family Practice |
| New Mexico | I20250926000369 | Practitioner - Osteopathic Manipulative Medicine |
| South Carolina | I20251030003177 | Practitioner - Osteopathic Manipulative Medicine |
| Iowa | I20251125001161 | Practitioner - Family Practice |
| North Dakota | I20251125004640 | Practitioner - Osteopathic Manipulative Medicine |
| Missouri | I20251215001713 | Practitioner - Family Practice |
| Kansas | I20251215003298 | Practitioner - Family Practice |
Medicare enrolment is recorded as approved under the provider type Practitioner - Family Practice. There are 43 separate enrolment records across 42 states (CA, ID, AZ, NV, TN, OR, UT, TX, CO, GA, AL, MT, FL, IN, NE, MS, ME, CT, OK, MN, KY, OH, WI, NJ, NC, LA, IL, NY, WA, SD, MA, MD, PA, NH, DE, VA, NM, SC, IA, ND, MO, KS). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Family Medicine covers
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity. NUCC Health Care Provider Taxonomy, code 207Q00000X
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 | 1053651497 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Feb 21, 2013 |
| Last updated | Sep 20, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | D.O. |
| Practice address |
5 HUTTON CENTRE DR STE 950 Santa Ana, CA 92707 (855) 434-7763 Fax (949) 281-5550 |
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 | 5 | 3 | 6 | 5 | 1 | 4 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 1 | 3 | 3 | 5 | 2 | 4 | 9 |
Sum = 53 · next multiple of 10 = 60 · check digit = 7 · actual last digit = 7
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.