Helm Orthodontics
Registered legal name: Nathan B Helm DDS MS PLLC
4809 Argonne St Ste 240, Denver, CO 80249
The registry record
- NPI
- 1992309470
- Other NPIs
- 1770895625 (same organization at this address, folded into this listing)
- Registered as
- Type-2 organization (not an individual dentist's personal NPI)
- Dental categories
- Dental clinic, Orthodontics
- Taxonomy codes
- 261QD0000X (Dental clinic or center); 1223X0400X (Orthodontics and dentofacial orthopedics)
- Practice location
- 4809 Argonne St Ste 240, Denver, CO 80249
- Telephone
- (303) 371-0371
- NPI issued
- 25 November 2020 (5 years ago)
- Record updated
- 25 November 2020 (5 years ago)
- Certified by the practice
- 25 November 2020
- NPI status
- NPI active as reported by CMS 2026-08
- Metro area
- Denver-Aurora-Centennial, CO (metropolitan area, Denver County)
- State
- Colorado (3,323 registered practices)
- Subpart of
- Nathan B. Helm DDS MS PLLC
- Sibling NPIs
- Helm Orthodontics (1861171084)
- Same address
- Green Valley Ranch Cosmetic & Family Dental and Green Valley Kids Pediatric Dentistry
- Map position
- Census address match at street level
- Snapshot
- NPPES data dissemination file, 10 August 2026
What the record tells you
Helm Orthodontics, the trading name of Nathan B Helm DDS MS PLLC, is an NPI registry record for a dental organization at 4809 Argonne St Ste 240 in Denver, Colorado 80249. CMS issued NPI 1992309470 on 25 November 2020, and the practice last updated its own entry on 25 November 2020. That was 5 years ago, so treat the phone number and the suite number as unconfirmed until someone answers. CMS records it as a subpart of Nathan B. Helm DDS MS PLLC, so billing and pricing may follow the parent's policies.
It is registered under 2 dental taxonomy codes: Dental clinic or center (261QD0000X), Orthodontics and dentofacial orthopedics (1223X0400X). That puts it in 2 categories on this site, led by dental clinic or center. A practice that registers more than one category is telling CMS it does more than one kind of dental work at this address, which is why it has a page here rather than a row. No other address in the registry carries this name, though a practice trading under a chain brand often registers each office under its own legal name, so check the brand as well. One further NPI is registered to what looks like the same business at this address (Helm Orthodontics, NPI 1861171084); it is covered by this page rather than given a page of their own. 2 other dental records share the street address: Green Valley Ranch Cosmetic & Family Dental and Green Valley Kids Pediatric Dentistry.
Denver holds 425 registered dental practices inside the Denver-Aurora-Centennial, CO area, which has 1,791 in total on the Colorado side and ranks 1st in the state. 103 of the Denver records also register dental clinic or center, so this is one of several local options in that category. Across the metro the mix runs general dentistry 56.8%, dental clinic or center 19.9%, orthodontics 12.2%. The closest other registered practices are Green Valley Ranch Cosmetic & Family Dental (0 miles, Denver), Green Valley Kids Pediatric Dentistry (0 miles, Denver) and Perfect Teeth - Green Valley Ranch P.C. (0.2 miles, Denver), with 2 more inside 0.4 miles.
On our figures a routine adult cleaning in Colorado runs $110 to $165 cash and scaling and root planing $180 to $280 per quadrant, against a US average of $125. This practice's own prices are not in the registry and never will be: NPPES holds identifiers, not fees. Call (303) 371-0371 and ask for the cash price on code D1110, whether the exam and X-rays are included, and whether they run a membership plan if you have no insurance.
Nearest alternatives
The 5 closest registered dental practices to 4809 Argonne St Ste 240, straight-line distance. Rows without a link are listed on their metro page rather than having one of their own.
| Practice | City | Distance | Categories | Phone on the record |
|---|---|---|---|---|
| Green Valley Ranch Cosmetic & Family Dental | Denver, CO | 0 mi | General | (303) 501-0763 |
| Green Valley Kids Pediatric Dentistry | Denver, CO | 0 mi | Pediatric | (303) 371-4485 |
| Perfect Teeth - Green Valley Ranch P.C. | Denver, CO | 0.2 mi | General | (303) 576-6884 |
| Comfort Dental Green Valley Ranch | Denver, CO | 0.3 mi | General | (303) 371-8247 |
| Havens Dental Care | Denver, CO | 0.4 mi | General | (720) 674-0260 |
The benchmark to hold a quote from Helm Orthodontics against. All 50 states compared.
What to ask when you call
- The cash price for D1110, a routine adult cleaning, and whether the exam (D0120) and X-rays (D0274) are inside or outside that number.
- Whether you need scaling and root planing before a routine clean, and the per-quadrant price for D4341 or D4342 if so.
- Whether they run an in-house membership plan, and what it covers against what it costs a year.
- Whether they are taking new patients and how far out the next hygiene appointment is.
- The practice license, with your state dental board. An NPI is a billing identifier and proves nothing about licensing.
CMS NPPES NPI data file, August 2026, snapshot 10 August 2026. US federal public data (FOIA-disclosable, no charge). CMS NPI files. NPI registry records, status as reported by CMS in the August 2026 data dissemination file. NPPES is an identifier registry, not a license register: an NPI does not validate that a practice is licensed, accredited or currently open. Practices maintain their own NPPES entries. Every page shows the date the record was last updated; addresses and phone numbers are as self-reported and are not verified by us. This page describes a registry record. It is not a review, an endorsement or a check on Helm Orthodontics.
Price figures are our own, last verified April 2026. State averages are our estimates compiled from FAIR Health regional cost data and CMS Medicare fee schedules; the ADA discontinued its national Survey of Dental Fees in 2023, so no national fee survey exists. Treat them as a starting point and call two or three offices for an actual quote.