DR. RONALD D GELLIS PH.D.
NPI 1891038352
Clinical Neuropsychologist in Rancho Santa Margarita, CA
NPI Status: Active since April 03, 2013
Contact Information
25 FLORAMAR
RANCHO SANTA MARGARITA, CA
ZIP 92688
Phone: (949) 533-6075
- Individual
- Male
- Clinical Neuropsychologist
- Accepts Insurance
- PECOS Enrolled
About RONALD GELLIS
This page provides the complete NPI Profile along with additional information for Ronald Gellis, a provider established in Rancho Santa Margarita, California with a medical specialization in Clinical Neuropsychologist. The healthcare provider is registered in the NPI registry with number 1891038352 assigned on April 2013. The practitioner's primary taxonomy code is 103G00000X with license number PSY9191 (CA). The provider is registered as an individual and his NPI record was last updated 5 years ago.
- NPI
- 1891038352
- Provider Name
- DR. RONALD D GELLIS PH.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 25 FLORAMAR RANCHO SANTA MARGARITA, CA 92688
- Location Phone
- (949) 533-6075
- Mailing Address
- 25 FLORAMAR RANCHO SANTA MARGARITA, CA 92688
- Mailing Phone
- (949) 533-6075
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 04-03-2013
- Last Update Date
- 06-09-2020
- Code Navigator
Location Map
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Clinical Neuropsychologist
- Taxonomy Code
- 103G00000X
- Type
- Behavioral Health & Social Service Providers
- License No.
- PSY9191
- License State
- CA
- Taxonomy Description
- A clinical psychologist who applies principles of assessment and intervention based upon the scientific study of human behavior as it relates to normal and abnormal functioning of the central nervous system. The specialty is dedicated to enhancing the understanding of brain-behavior relationships and the application of such knowledge to human problems.
Secondary Taxonomies
The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.
| No. | Taxonomy Code | Type | Classification / Specialization |
License No. (State) |
|---|---|---|---|---|
| 1 | 101YA0400X | Behavioral Health & Social Service Providers | Counselor | PSY9191 (CA) |
| 2 | 101YM0800X | Behavioral Health & Social Service Providers | Counselor | PSY9191 (CA) |
| 3 | 101YP2500X | Behavioral Health & Social Service Providers | Counselor | PSY9191 (CA) |
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
- Gold 10 Advanced: $0 PCP + Aetna network + $0 walk-in clinic + Adult Dental + Vision - HMO
- Gold 10: $0 PCP at Aetna network & MinuteClinic Primary Care + $0 CVS Health Virtual Care - HMO
- Gold 3 Advanced: Aetna network + $0 walk-in clinic + $0 CVS Health Virtual Care 24/7 - HMO
- Gold 3 Advanced: Aetna network + $0 walk-in clinic + Adult Dental + Vision - HMO
- Gold 4 Advanced: $0 PCP + Aetna network + $0 walk-in clinic + $0 CVS Health Virtual Care 24/7 - HMO
- Gold S: Aetna network + $0 walk-in clinic + $0 CVS Health Virtual Care 24/7 - HMO
- Silver 10 Advanced: $0 PCP + Aetna network + $0 walk-in clinic + $0 CVS Health Virtual Care 24/7 - HMO
- Silver 10 Advanced: $0 PCP + Aetna network + $0 walk-in clinic + Adult Dental + Vision - HMO
- Silver 10: $0 PCP at Aetna network & MinuteClinic Primary Care + $0 CVS Health Virtual Care - HMO
- Silver 5 Advanced: Aetna network + $0 walk-in clinic + $0 CVS Health Virtual Care 24/7 - HMO
- Silver S: Aetna network + $0 walk-in clinic + $0 CVS Health Virtual Care 24/7 - HMO
- Silver S: Aetna network + $0 walk-in clinic + $0 CVS Health Virtual Care 24/7 + Adult Dental+Vision - HMO
- UHC Bronze Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care) - HMO
- UHC Bronze Standard - HMO
- UHC Bronze Value ($0 Virtual Urgent Care, $3 Tier 2 Rx) - HMO
- UHC Gold Advantage ($0 Virtual Urgent Care, $3 Tier 2 Rx) - HMO
- UHC Gold Advantage+ ($0 Virtual Urgent Care, $3 Tier 2 Rx, Dental + Vision) - HMO
- UHC Gold Standard - HMO
- UHC Gold Standard $0 Indiv Ded ($0 Virtual Urgent Care) - HMO
- UHC Kelsey-Seybold Bronze Copay Focus - HMO
- UHC Kelsey-Seybold Gold Copay Focus ($5 Tier 2 Rx) - HMO
- UHC Kelsey-Seybold Silver Copay Focus - HMO
- UHC Silver Advantage ($0 Virtual Urgent Care, $3 Tier 2 Rx) - HMO
- UHC Silver Advantage+ ($0 Virtual Urgent Care, $3 Tier 2 Rx, Dental + Vision) - HMO
- UHC Silver Standard - HMO
- UHC Silver Value ($0 Virtual Urgent Care, $3 Tier 2 Rx) - HMO
*Please verify directly with this provider to make sure your insurance plan is currently accepted.
Medicare Participation & PECOS Enrollment Status
Ronald Gellis is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging and Durable Medical Equipment (DME).
What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.
Is the provider registered in PECOS? Yes
Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes
Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes
Eligible to Order or Refer a Home Health Agency (HHA): No
Eligible to Order or Refer Power Mobility Devices: No
Reviews for DR. RONALD D GELLIS PH.D.
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NPI Validation Check Digit Calculation
The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.
| Start with the original NPI number, the last digit is the check digit and is not used in the calculation. | |||||||||
| 1 | 8 | 9 | 1 | 0 | 3 | 8 | 3 | 5 | 2 |
| Step 1: Double the value of the alternate digits, beginning with the rightmost digit. | |||||||||
| 2 | 8 | 18 | 1 | 0 | 3 | 16 | 3 | 10 | |
| Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24. | |||||||||
| 2 + 8 + 1 + 8 + 1 + 0 + 3 + 1 + 6 + 3 + 1 + 0 + 24 = 58 | |||||||||
| Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit. | |||||||||
| 60 - 58 = 2 | 2 | ||||||||
The NPI number 1891038352 is valid because the calculated check digit 2 using the Luhn validation algorithm matches the last digit of the original NPI number.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1891038352, enumerated in the NPI registry as an "individual" on April 03, 2013
The provider is located at 25 Floramar Rancho Santa Margarita, Ca 92688 and the phone number is (949) 533-6075
The provider's speciality is Clinical Neuropsychologist with taxonomy code 103G00000X
The provider might be accepting Accepts: Aetna CVS Health and UnitedHealthcare. Please consult your insurance carrier or call the provider to make sure your health plan is currently accepted.
Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary the provider is eligible to order or refer: Part B Clinical Laboratory and Imaging and Durable Medical Equipment (DME).
This NPI record was last updated on April 03, 2013. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
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