CHRISTINA ANN HARDING M.D.
NPI 1285925164
Internal Medicine in Incline Village, NV
NPI Status: Active since April 26, 2011
Contact Information
800 SOUTHWOOD BLVD STE 107
INCLINE VILLAGE, NV
ZIP 89451
Phone: (775) 262-9957
- Individual
- Female
- Internal Medicine
- Opted-Out Medicare
About CHRISTINA HARDING
This page provides the complete NPI Profile along with additional information for Christina Harding, an internist established in Incline Village, Nevada with a medical specialization in Internal Medicine. The healthcare provider is registered in the NPI registry with number 1285925164 assigned on April 2011. The practitioner's primary taxonomy code is 207R00000X with license number 25833 (NV). The provider is registered as an individual and her NPI record was last updated February 2026.
- NPI
- 1285925164
- Provider Name
- CHRISTINA ANN HARDING M.D.
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 800 SOUTHWOOD BLVD STE 107 INCLINE VILLAGE, NV 89451
- Location Phone
- (775) 262-9957
- Mailing Address
- 800 SOUTHWOOD BLVD STE 107 INCLINE VILLAGE, NV 89451
- Mailing Phone
- (617) 285-8078
- Is Sole Proprietor?
- No
- Enumeration Date
- 04-26-2011
- Last Update Date
- 02-18-2026
- Code Navigator
An internist like Christina Harding is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.
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. Christina Harding opted out of Medicare effective on 01-01-2026 until 01-01-2028. 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 but is permitted to 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
Internal Medicine
- Taxonomy Code
- 207R00000X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 25833
- License State
- NV
- Taxonomy Description
- A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
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 | 207R00000X | Allopathic & Osteopathic Physicians | Internal Medicine | 16639 (NH) |
| 2 | 207R00000X | Allopathic & Osteopathic Physicians | Internal Medicine | A138443 (CA) |
| 3 | 390200000X | Student, Health Care | Student in an Organized Health Care Education/Training Program | (MA) |
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: 01-01-2026
Opt-Out End Date: 01-01-2028
Eligible to Order and Refer? Yes
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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 1285925164, we treat the final digit (4) 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 56. The final step is to find the difference between that total and the next multiple of ten (60 - 56 = 4).
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 56 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 1 provider is registered at the same or a nearby location.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1285925164, enumerated as an "individual" on April 26, 2011.
The provider is located at 800 SOUTHWOOD BLVD STE 107 INCLINE VILLAGE, NV 89451 and the phone number is (775) 262-9957.
Internal Medicine with taxonomy code 207R00000X.
