DR. JOHN F. CALLAHAN PH.D.
NPI 1346264421
Psychologist - Clinical in Hartford, CT

NPI Status: Active since July 26, 2006

Contact Information

664 PROSPECT AVE
HARTFORD, CT
ZIP 06105
Phone: (860) 236-8087
Fax: (860) 586-7422

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  • Individual
  • Male
  • Years of Experience 37
  • Psychologist
  • Clinical
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About JOHN CALLAHAN

This page provides the complete NPI Profile along with additional information for John Callahan, a provider established in Hartford, Connecticut with a medical specialization in Psychologist, focusing in clinical and more than 37 years of experience. The healthcare provider is registered in the NPI registry with number 1346264421 assigned on July 2006. The practitioner's primary taxonomy code is 103TC0700X with license number 001612 (CT). The provider is registered as an individual and his NPI record was last updated 18 years ago.

NPI
1346264421
Provider Name
DR. JOHN F. CALLAHAN PH.D.
Gender
Male
Entity Type
Individual
Location Address
664 PROSPECT AVE HARTFORD, CT 06105
Location Phone
(860) 236-8087
Location Fax
(860) 586-7422
Mailing Address
664 PROSPECT AVE HARTFORD, CT 06105
Mailing Phone
(860) 236-8087
Mailing Fax
(860) 586-7422
Medical School Name
OTHER
Graduation Year
1989
Is Sole Proprietor?
Yes
Enumeration Date
07-26-2006
Last Update Date
07-08-2007
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A clinical psychologist like John Callahan assesses, diagnoses, and treats mental, emotional, and behavioral disorders. Clinical psychologists help people deal with problems ranging from short-term personal issues to severe, chronic conditions. Clinical psychologists interview patients, give diagnostic tests, provide psychotherapy and design behavior modification programs to help patients.

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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 Clinical

Taxonomy Code
103TC0700X
Type
Behavioral Health & Social Service Providers
License No.
001612
License State
CT
Taxonomy Description
A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.

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.

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
060001612CT04OTHER (01)CTANTHEM BC/BS OF CT

Medicare Participation & PECOS Enrollment Status

John Callahan is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

John Callahan 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

  • PECOS PAC ID: 8729083548

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20150319001340

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • 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

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $45.77 for a new patient copayment and $26.67 for an established patient copayment.

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 06105 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99205

  • Average New Patient Price $183.1
  • Minimum New Patient Price $60.82
  • Maximum New Patient Price $183.1
  • Average New Patient Copayment $45.77
  • Minimum New Patient Copayment $15.2
  • Maximum New Patient Copayment $45.77

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99214

  • Average Established Patient Price $106.68
  • Minimum Established Patient Price $19.76
  • Maximum Established Patient Price $149.26
  • Average Established Patient Copayment $26.67
  • Minimum Established Patient Copayment $4.94
  • Maximum Established Patient Copayment $37.31

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

Reviews for DR. JOHN F. CALLAHAN 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.
1346264421
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
238646844
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 3 + 8 + 6 + 4 + 6 + 8 + 4 + 4 + 24 = 69
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
70 - 69 = 11

The NPI number 1346264421 is valid because the calculated check digit 1 using the Luhn validation algorithm matches the last digit of the original NPI number.

Other Providers at the Same Location


The following 15 providers are registered at the same or nearby location.

NPI Name / Type Taxonomy Address
1073552865 DIANE M BRAY APRN, BC
Individual
Clinical Nurse Specialist (Psychiatric/Mental Health)664 PROSPECT AVE
HARTFORD, CT 06105
(860) 236-8087
1780617753 MARYANNE L LUDGIN LCSW
Individual
Social Worker (Clinical)664 PROSPECT AVE
HARTFORD, CT 06105
(860) 236-8087
1235244690MS. AIMEE CAROL GOLBERT MSW
Individual
Social Worker (Clinical)664 PROSPECT AVE 2ND FLOOR
HARTFORD, CT 06105
(860) 233-4830
1871605493DR. ANDREW W. MEISLER PH.D.
Individual
Psychologist (Clinical)664 PROSPECT AVE
HARTFORD, CT 06105
(860) 236-8087
1497849699MS. JAYNE DEAN LMFT
Individual
Counselor (Addiction (Substance Use Disorder))664 PROSPECT AVE 2ND FLOOR
HARTFORD, CT 06105
(860) 233-4830
1639222755 FRANCES B BROWN
Individual
Counselor (Mental Health)664 PROSPECT AVE
HARTFORD, CT 06105
(860) 233-4830
1386790392MS. RUTH HOFSTATTER L.P.C.
Individual
Counselor (Mental Health)664 PROSPECT AVE
HARTFORD, CT 06105
(860) 233-4830
1770621310DR. MARK S BRAUNSDORF PH.D.
Individual
Psychologist664 PROSPECT AVE
HARTFORD, CT 06105
(860) 231-7072
1841412186MRS. CYNTHIA R LEACH LCSW
Individual
Social Worker (Clinical)664 PROSPECT AVE
HARTFORD, CT 06105
(860) 233-5972
1720255862MS. JESSICA G LYONS LCSW
Individual
Social Worker (Clinical)664 PROSPECT AVE 2ND FLOOR
HARTFORD, CT 06105
(860) 232-0020
1407083843JEFFREY A ASMAR LLC
Organization
Community/Behavioral Health664 PROSPECT AVE
HARTFORD, CT 06105
(860) 324-0742
1679502140DR. STEVEN M KATZ MD
Individual
Psychiatry & Neurology (Psychiatry)664 PROSPECT AVE
HARTFORD, CT 06105
(860) 236-8087
1245561463AVALON PSYCHOLOGICAL GROUP, P.C.
Organization
Psychologist (Counseling)664 PROSPECT AVE
HARTFORD, CT 06105
(860) 558-1317
1245681386DR. CARLITA FRANCINE ELIAS PSY.D
Individual
Psychologist (Clinical)664 PROSPECT AVE
HARTFORD, CT 06105
(860) 327-5147
1588828644 CATHERINE TUFANO LPC
Individual
Counselor (Professional)664 PROSPECT AVE
HARTFORD, CT 06105
(860) 205-6433

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1346264421, enumerated in the NPI registry as an "individual" on July 26, 2006

The provider is located at 664 Prospect Ave Hartford, Ct 06105 and the phone number is (860) 236-8087

The provider's speciality is Psychologist with taxonomy code 103TC0700X with a focus in Clinical

The provider has more than 37 years of experience.

The provider might be accepting Accepts: Blue Cross Blue Shield, Anthem Blue Cross,. 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).

Medicare beneficiaries should expect a typical cost of $183.1 with an average copayment of $45.77 for new patient appointments. Established patients should expect a typical charge of $106.68 and an average copayment of 26.67. Please review your insurance plan or contact the provider directly to determine your specific costs.

This NPI record was last updated on July 26, 2006. 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].
NPI Profile data is regularly updated with the latest NPI registry information, if you would like to update or remove your NPI Profile in this website please contact us.