MR. MARK EDWARD HOLLADAY CRNP
NPI 1487809430
Nurse Practitioner - Acute Care in Salisbury, MD
NPI Status: Active since November 18, 2008
Contact Information
100 E CARROLL ST
SALISBURY, MD
ZIP 21801
Phone: (410) 546-6400
NPPES record last updated: January 27, 2021. Verified against the NPPES registry weekly; last sync: July 12, 2026.
Record update history: Jan 27, 2021, Dec 18, 2020 (2 updates tracked since 2020).
- Individual
- Male
- Nurse Practitioner
- Acute Care
- Accepts Insurance
About MARK HOLLADAY
This page provides the complete NPI Profile along with additional information for Mark Holladay, a provider established in Salisbury, Maryland with a medical specialization in Nurse Practitioner, focusing in acute care . The healthcare provider is registered in the NPI registry with number 1487809430 assigned on November 2008. The practitioner's primary taxonomy code is 363LA2100X with license number AC003467 (MD). The provider is registered as an individual and his NPI record was last updated 5 years ago.
- NPI
- 1487809430
- Provider Name
- MR. MARK EDWARD HOLLADAY CRNP
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 100 E CARROLL ST SALISBURY, MD 21801
- Location Phone
- (410) 546-6400
- Mailing Address
- 100 E CARROLL ST SALISBURY, MD 21801
- Mailing Phone
- (410) 546-6400
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 11-18-2008
- Last Update Date
- 01-27-2021
- Code Navigator
A nurse practitioner (NP) like Mark Holladay is an experienced registered nurse with a master’s or doctoral degree and advanced clinical training. Nurse practitioners can work in many different specialties including primary care, pediatrics, cardiology, emergency, women’s health, oncology or geriatrics. Nurse practitioners provide services like physical exams, order laboratory tests, manage diseases, write prescriptions, etc.
Location Map
Secondary Locations
- 13067 Brian Hill Rd
Madison, AL 35756
(256) 683-4117
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
Nurse Practitioner Acute Care
- Taxonomy Code
- 363LA2100X
- Type
- Physician Assistants & Advanced Practice Nursing Providers
- License No.
- AC003467
- License State
- MD
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 | 111N00000X | Chiropractic Providers | Chiropractor | 2259 (AL) |
| 2 | 363LA2100X | Physician Assistants & Advanced Practice Nursing Providers | Nurse Practitioner | 1-148731 (AL) |
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
- AmeriHealth Caritas Next Bronze Essential + No Referrals - HMO
- AmeriHealth Caritas Next Bronze Premier + No Referrals - HMO
- AmeriHealth Caritas Next Bronze Signature + No Referrals - HMO
- AmeriHealth Caritas Next Gold Premier + No Referrals - HMO
- AmeriHealth Caritas Next Gold Signature + No Referrals - HMO
- AmeriHealth Caritas Next Silver Essential + No Referrals - HMO
- AmeriHealth Caritas Next Silver Premier + No Referrals - HMO
- AmeriHealth Caritas Next Silver Signature + No Referrals - HMO
*Please verify directly with this provider to make sure your insurance plan is currently accepted.
Reviews for MR. MARK EDWARD HOLLADAY CRNP
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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 1487809430, we treat the final digit (0) 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 70. The final step is to find the difference between that total and the next multiple of ten (70 - 70 = 0).
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 70 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
SALISBURY, MD 21801
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1487809430, enumerated as an "individual" on November 18, 2008.
The provider is located at 100 E CARROLL ST SALISBURY, MD 21801 and the phone number is (410) 546-6400.
Nurse Practitioner with taxonomy code 363LA2100X and a focus in Acute Care.
The provider might be accepting Accepts: AmeriHealth Caritas Next. Please consult your insurance carrier or call the provider to verify.
