DR. ROBERT GEOFFREY GELLIN D.M.D., M.H.S.
NPI 1104989847
Dentist - Periodontics in Charleston, SC

NPI Status: Active since December 17, 2006

Contact Information

173 ASHLEY AVE
DENTAL FACULTY PRACTICE, BSB ROOM 346
CHARLESTON, SC
ZIP 29425
Phone: (843) 792-3444
Fax: (843) 792-0348

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  • Individual
  • Male
  • Dentist
  • Periodontics
  • Accepts Insurance

About ROBERT GELLIN

This page provides the complete NPI Profile along with additional information for Robert Gellin, a provider established in Charleston, South Carolina with a medical specialization in Dentist, focusing in periodontics . The healthcare provider is registered in the NPI registry with number 1104989847 assigned on December 2006. The practitioner's primary taxonomy code is 1223P0300X with license number 345 (SC). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI
1104989847
Provider Name
DR. ROBERT GEOFFREY GELLIN D.M.D., M.H.S.
Gender
Male
Entity Type
Individual
Location Address
173 ASHLEY AVE DENTAL FACULTY PRACTICE, BSB ROOM 346 CHARLESTON, SC 29425
Location Phone
(843) 792-3444
Location Fax
(843) 792-0348
Mailing Address
173 ASHLEY AVE DENTAL FACULTY PRACTICE, BSB ROOM 346 CHARLESTON, SC 29425
Mailing Phone
(843) 792-3444
Mailing Fax
(843) 792-0348
Is Sole Proprietor?
Yes
Enumeration Date
12-17-2006
Last Update Date
09-11-2025
Code Navigator

A dentist like Robert Gellin is a skilled in and licensed provider that diagnoses and treats problems with patients teeth, gums, and related parts of the mouth. Dentists educate patients on how to take care of the teeth and gums and provide information on diet choices that affect oral health. Dentists must be licensed in the state in which they work.

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

Dentist Periodontics

Taxonomy Code
1223P0300X
Type
Dental Providers
License No.
345
License State
SC
Taxonomy Description
That specialty of dentistry which encompasses the prevention, diagnosis and treatment of diseases of the supporting and surrounding tissues of the teeth or their substitutes and the maintenance of the health, function and esthetics of these structures and tissues.

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)
11223G0001XDental Providers

Dentist
General Practice

2797 (SC)

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

  • Anthem Bronze Essential 10150 ($0 Virtual PCP + $0 Select Drugs + Incentives) - HMO
  • Anthem Bronze Essential 10150 Adult Dental/Vision ($0 Virtual PCP + $0 Select Drugs + Incentives) - HMO
  • Anthem Bronze Essential 6500 HSA (+ Incentives) - HMO
  • Anthem Bronze Essential 7500 Standard ($0 Virtual PCP + $0 Select Drugs + Incentives) - HMO
  • Anthem Bronze Essential POS 5500 ($0 Virtual PCP + $0 Select Drugs + Incentives) - POS
  • Anthem Bronze Essential POS 7500 Standard ($0 Virtual PCP + $0 Select Drugs + Incentives) - POS
  • Anthem Bronze Pathway 10150 ($0 Virtual PCP + $0 Select Drugs + Incentives) - EPO
  • Anthem Bronze Pathway 10600 ($0 Virtual PCP + $0 Select Drugs) - HMO
  • Anthem Bronze Pathway 10600 Adult Dental/Vision ($0 Virtual PCP + $0 Select Drugs) - HMO
  • Anthem Bronze Pathway 6900 ($0 Virtual PCP + $0 Select Drugs + Incentives) - EPO
  • Anthem Bronze Pathway 7500 Standard ($0 Virtual PCP + $0 Select Drugs + Incentives) - EPO
  • Anthem Bronze Pathway 7500 Standard ($0 Virtual PCP + $0 Select Drugs) - HMO
  • Anthem Bronze Pathway 8500 for HSA - HMO
  • Anthem Bronze Pathway/Lean 5000 (3 Free PCP Visits + $0 Select Drugs + Incentives) - HMO
  • Anthem Bronze Pathway/Lean HSA (+ Incentives) - HMO
  • Anthem Bronze Pathway/Lean Standard ($0 Virtual PCP + $0 Select Drugs + Incentives) - HMO
  • Anthem Catastrophic Essential (+ Incentives) - HMO
  • Anthem Catastrophic Pathway (+ Incentives) - EPO
  • Anthem Gold Essential 2000 Standard ($0 Virtual PCP + $0 Select Drugs + Incentives) - HMO
  • Anthem Gold Essential 2200 ($0 Virtual PCP + $0 Select Drugs + Incentives) - HMO
  • BlueCare Dental 4 Kids? 1A - PPO
  • BlueCare Dental 4 Kids? 1B - PPO
  • BlueCare Dental? 1A - PPO
  • BlueCare Dental? 1B - PPO
  • BlueCare Dental? 1C - PPO
  • BlueCare Dental? 1D - PPO
  • BlueCare Dental 4 Kids? 1A - PPO
  • BlueCare Dental 4 Kids? 1B - PPO
  • BlueCare Dental? 1A - PPO
  • BlueCare Dental? 1B - PPO
  • BlueCare Dental? 1C - PPO
  • BlueCare Dental? 1D - PPO
  • BlueCare Dental 1D - PPO
  • BlueCare Dental 4 Kids? 1A - PPO
  • BlueCare Dental 4 Kids? 1B - PPO
  • BlueCare Dental? 1A - PPO
  • BlueCare Dental? 1B - PPO
  • BlueCare Dental? 1C - PPO
  • Blue Secure Dental Gold 1 - PPO
  • Blue Secure Dental Silver 1 - PPO

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Reviews for DR. ROBERT GEOFFREY GELLIN D.M.D., M.H.S.

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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 1104989847, we treat the final digit (7) 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 73. The final step is to find the difference between that total and the next multiple of ten (80 - 73 = 7).

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.

Pos 1
1
Doubled → 2
Pos 2
1
Unchanged
Pos 3
0
Doubled → 0
Pos 4
4
Unchanged
Pos 5
9
Doubled → 18 → 1 + 8
Pos 6
8
Unchanged
Pos 7
9
Doubled → 18 → 1 + 8
Pos 8
8
Unchanged
Pos 9
4
Doubled → 8
Check
7
Target digit
Regular digit Doubled digit Check digit

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.

1 → 2 0 → 0 9 → 18 → 9 9 → 18 → 9 4 → 8

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 1 + 0 + 4 + 1 + 8 + 8 + 1 + 8 + 8 + 8 + 24 = 73

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 73 is 80. The difference is the calculated check digit.

80 - 73 = 7
This NPI is valid
The calculated check digit is 7, which matches the last digit of 1104989847.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Dentist (General Practice)
173 ASHLEY AVE, BSB-335
CHARLESTON, SC 29425
Dentist (Periodontics)
173 ASHLEY AVE, ROOM 346 BSB
CHARLESTON, SC 29425
Dentist
173 ASHLEY AVE, BSB346
CHARLESTON, SC 29425
Dentist (Oral and Maxillofacial Pathology)
173 ASHLEY AVE, ROOM 544 BSB, DIVISION OF ORAL PATHOLOGY, MUSC
CHARLESTON, SC 29425
Dentist
173 ASHLEY AVE, DENTAL FACULTY PRACTICE
CHARLESTON, SC 29425
Dentist (General Practice)
173 ASHLEY AVE, BSB - ROOM 346
CHARLESTON, SC 29425
Dentist (Periodontics)
173 ASHLEY AVE, 343 BSB
CHARLESTON, SC 29425
Dentist
173 ASHLEY AVE
CHARLESTON, SC 29425
Dentist (Prosthodontics)
173 ASHLEY AVE, BSB 547
CHARLESTON, SC 29425
Dentist (General Practice)
173 ASHLEY AVE, BSB 124 COLLEGE OF DENTAL MEDICINE
CHARLESTON, SC 29425
Dentist
173 ASHLEY AVE
CHARLESTON, SC 29425
Dentist (Endodontics)
173 ASHLEY AVE, BSB 346
CHARLESTON, SC 29425
Dentist (Oral and Maxillofacial Surgery)
173 ASHLEY AVE, BSB 249 POB 250507
CHARLESTON, SC 29425
Dentist (Oral and Maxillofacial Surgery)
173 ASHLEY AVE, BSB 249,
CHARLESTON, SC 29425
Dentist (Periodontics)
173 ASHLEY AVE
CHARLESTON, SC 29425
Dentist (General Practice)
173 ASHLEY AVE, BSB RM 546
CHARLESTON, SC 29425
Dentist (Oral and Maxillofacial Pathology)
173 ASHLEY AVE
CHARLESTON, SC 29425
Dentist (Endodontics)
173 ASHLEY AVE, BSB 546, MSC 507
CHARLESTON, SC 29425
Dentist (Oral and Maxillofacial Surgery)
173 ASHLEY AVE
CHARLESTON, SC 29425
Dentist (Oral and Maxillofacial Pathology)
173 ASHLEY AVE
CHARLESTON, SC 29425

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1104989847, enumerated as an "individual" on December 17, 2006.

The provider is located at 173 ASHLEY AVE DENTAL FACULTY PRACTICE, BSB ROOM 346 CHARLESTON, SC 29425 and the phone number is (843) 792-3444.

Dentist with taxonomy code 1223P0300X and a focus in Periodontics.

The provider might be accepting Accepts: Anthem Blue Cross and Blue Shield, Blue Cross and. Please consult your insurance carrier or call the provider to verify.