DR. GREGORY ERNEST KOCH PSY.D.
NPI 1730180852
Psychologist - Group Psychotherapy in San Diego, CA
NPI Status: Active since August 10, 2005
Contact Information
4081 STEPHENS ST
SAN DIEGO, CA
ZIP 92103
Phone: (888) 588-7836
Fax: (888) 588-7836
- Individual
- Male
- Psychologist
- Group Psychotherapy
- Opted-Out Medicare
About GREGORY KOCH
This page provides the complete NPI Profile along with additional information for Gregory Koch, a provider established in San Diego, California with a medical specialization in Psychologist, focusing in group psychotherapy . The healthcare provider is registered in the NPI registry with number 1730180852 assigned on August 2005. The practitioner's primary taxonomy code is 103TP2701X with license number PSY19917 (CA). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1730180852
- Provider Name
- DR. GREGORY ERNEST KOCH PSY.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 4081 STEPHENS ST SAN DIEGO, CA 92103
- Location Phone
- (888) 588-7836
- Location Fax
- (888) 588-7836
- Mailing Address
- 4081 STEPHENS ST SAN DIEGO, CA 92103
- Mailing Phone
- (888) 588-7836
- Mailing Fax
- (888) 588-7836
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 08-10-2005
- Last Update Date
- 09-11-2025
- Code Navigator
The provider doesn't accept Medicare and has signed an affidavit to be excluded from the Medicare program. If you are a Medicare beneficiary this means a provider can charge whatever they want for services rendered but must follow certain rules to do so. Gregory Koch opted out of Medicare effective on 07-01-2022 until 07-01-2026. Opt out periods last for two years and cannot be terminated unless the provider is opting out for the very first time and the affidavit is terminated no later than 90 days after the opt out effective date. Opt-out affidavits might renew automatically renew every two years. The provider opted out of Medicare and cannot order and refer services to other healthcare providers.
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
Psychologist Group Psychotherapy
- Taxonomy Code
- 103TP2701X
- Type
- Behavioral Health & Social Service Providers
- License No.
- PSY19917
- License State
- CA
- Taxonomy Description
- A psychologist who specializes in group psychology and group psychotherapy that is an evidenced-based specialty that prepares group leaders to identify and capitalize on developmental and healing possibilities embedded in the interpersonal/intrapersonal functioning of individual group members as well as collectively for the group. Emphasis is placed on the use of group dynamics to assist and treat individual group members. The specialty is applicable to all age groups, children, adolescents, adults and older adults, for a wide variety of conditions and concerns, and in numerous and diverse settings.
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 | 103T00000X | Behavioral Health & Social Service Providers | Psychologist | PSY19917 (CA) |
| 2 | 103TB0200X | Behavioral Health & Social Service Providers | Psychologist | PSY19917 (CA) |
| 3 | 103TC0700X | Behavioral Health & Social Service Providers | Psychologist | PSY19917 (CA) |
| 4 | 103TC2200X | Behavioral Health & Social Service Providers | Psychologist | PSY19917 (CA) |
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
*Please verify directly with this provider to make sure your insurance plan is currently accepted.
Additional Identifiers
The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.
| Identifier | Type / Code | Identifier State | Identifier Issuer |
|---|---|---|---|
| 0PL199170 | OTHER (01) | CA | BLUE SHIELD |
| 11397904 | OTHER (01) | CA | CAQH |
| PSY199170 | MEDICAID (05) | CA | |
| 5551998 | OTHER (01) | CA | FIRSTHEALTH/CCN |
Medicare Participation & PECOS Enrollment Status
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.
Opted-Out of Medicare? Yes
Opt-Out Effective Date: 07-01-2022
Opt-Out End Date: 07-01-2026
Eligible to Order and Refer? No
Reviews for DR. GREGORY ERNEST KOCH PSY.D.
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NPI NPI Number Validation
How NPI Validation Works
The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.
To verify the NPI 1730180852, we treat the final digit (2) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 58. The final step is to find the difference between that total and the next multiple of ten (60 - 58 = 2).
Digit-by-digit view
Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.
Step 1: Double every other digit from the right
Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 58 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 2 providers are registered at the same or a nearby location.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1730180852, enumerated as an "individual" on August 10, 2005.
The provider is located at 4081 STEPHENS ST SAN DIEGO, CA 92103 and the phone number is (888) 588-7836.
Psychologist with taxonomy code 103TP2701X and a focus in Group Psychotherapy.
The provider might be accepting Accepts: Blue Cross Blue Shield, Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.
