Diane Darcy, MS, RD, LDN
NPI 1336449420 · Registered Dietitian · Rockville, MD
Diane Darcy, MS, RD, LDN is a Registered Dietitian provider in Rockville, MD (NPI 1336449420).
Provider details
- NPI number
- 1336449420
- Entity type
- Individual
- Primary specialty
- Registered DietitianDietary & Nutritional Service Providers
- Credential
- MS, RD, LDN
- Sex
- Female
- Sole proprietor
- Yes
- License
- D01479 (MD)
Specialties & taxonomies
Dietary & Nutritional Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
52 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Therapy Procedure for Nutrition Management, Each 15 Minutes97802 | 52 | $34 |
Typical Medicare-allowed amounts for these services range $34–$34 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-10-24
- Last updated
- 2014-06-25
Frequently asked questions
- What is Diane Darcy's NPI number?
- Diane Darcy's National Provider Identifier (NPI) is 1336449420, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diane Darcy's specialty?
- Diane Darcy is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).
- Where is Diane Darcy located?
- Diane Darcy's practice location on file with NPPES is 15825 Shady Grove Rd, Rockville, MD 20850-4008.
- What is Diane Darcy's phone number?
- The practice phone number listed in the NPPES registry for Diane Darcy is (301) 869-9776.
- Is Diane Darcy's NPI active?
- Yes — Diane Darcy's NPI (1336449420) is active in the NPPES registry as of the last update on 2014-06-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.